The genes for sex-linked traits are carried on either the X or Y chromosome. Duchenne muscular dystrophy (DMD) is a recessive, sex-linked disease that is carried on the X chromosome. A woman with DMD and a man without the disease have a child. Which statement best describes the likelihood of the disease passing to their child?

a. There is a 100 percent chance that their daughter will have the disease.
b. There is a 50 percent chance that their son will have the disease.
c. There is a 50 percent chance that their daughter will have the disease.
d. There is a 100 percent chance that their son will have the disease.

Answers

Answer 1

There is a 50% probability that the child will be a boy. If this is the case, he will inherit the X chromosome from his mother and the Y chromosome from his father. Since the woman has DMD, the boy will certainly inherit the disease, since he only has one X chromosome and it carries the disease. We know that both of the mother's X chromosomes carry the disease because since it is recessive, both of her chromosomes must have it in order for her to have it.

There is also a 50% probability that the child is girl. If this is the case, she will inherit a normal X chromosome from her father and the disease-carrying X chromosome from her mother. Since the disease is recessive, she will not be affected by the disease, since she has one healthy X chromosome and one disease-carrying one.

If the child is a girl, there is a 0% chance that she will have the disease (although she will be a carrier).

If the child is a boy, there is a 100% chance that he will inherit the disease.

The answer is D)

Answer 2

Answer:

Explanation:

Related Questions

Japan is the leading producer of farm-raised shrimp, offering a lower price than Americans who farm or catch shrimp for a living. Shrimp farming requires converting coastline estuaries into holding pens for the baby shrimp to grow in. What will be the long-term consequences for Japan if this industry continues to grow?

A. Increased growth in the near-shore fishing and crabbing industries of Japan
B. Increased estuarine diversity because of new predators
C. Decreased pollution of estuaries and coastal waterways.
D. Decreased number of fish species who use the estuaries

Answers

The most likely answer is
D)Decreased number of fish species who use the estuaries.

The Japanese model for shrimp farming in estuaries basically involves converting estuary areas into shrimp farms, isolating these areas and dedicating them solely to the farming of shrimp. This excludes other fish species from areas that were previously the environment in which they lived.

Answer:

D. Decreased number of fish species who use the estuaries

Explanation:

Visit the website below and use the information to answer the question that follows. On the About Forensic DNA tab, read the sections titled “About Forensic DNA” and “Basics of DNA Typing.” DNA Evidence Basics How can DNA be used to help solve a crime?

Answers

Each person’s DNA is unique.Scientists use variable regions in DNA to create DNA profile.DNA samples can be taken from blood, bone, hair, or other body tissues and
products.DNA from a crime scene can be compared to DNA from a suspect.DNA typing can be used to solve old cases. this is what you need to write.

Forensic science is a branch of science that uses collected evidence to solve the case it can include the collection of DNA, blood samples, fingerprints etc.

How DNA can be used in solving crimes?

DNA or the genetic material of every individual is different and unique. The region that varies in individuals can be employed in forensic sciences to solve the case.

Crimes can be solved by DNA profiling that includes matching samples with the suspects or through a DNA database. Samples of hair, blood or hair at the crime scenes can be used for DNA extraction and profiling.

Thus, variable sequences of DNA can be used in solving crimes.

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Compared to fraternal twins, identical twins are _____ as likely to develop alzheimer's disease two times equally three times four times

Answers

Compared to fraternal twins, identical twins are EQUALLY likely to develop alzheimer's disease.
Several research studies on fraternal and identical twins have reported that identical twins have equal chance of developing alzheimer's disease. This is also true for emotional instability.

All cells have _____. (Select all that apply.)

an outer membrane or plasma membrane
cytoplasm
a cell wall
a nucleus
protoplasm
large vacuoles
chloroplasts

Answers

plasma membrane, cytoplasm, a nucleus, a cell wall

Final answer:

All cells have a plasma membrane, cytoplasm, and protoplasm. Not all cells have a cell wall, nucleus, large vacuoles, or chloroplasts; these features vary depending on the cell type (eukaryotic or prokaryotic).

Explanation:

All cells have certain components in common. These include:

An outer membrane or plasma membrane: This is a common feature that separates the cell's interior from its surrounding environment.Cytoplasm: A jelly-like substance within the cell where cellular components are embedded.Protoplasm: This term encompasses both the cytoplasm and the nucleus of the cell, including all other components within the plasma membrane.Ribosomes: Present in both prokaryotic and eukaryotic cells, these synthesize proteins.

Some structures are not shared by all cells:

A cell wall: While many cells, such as plant cells, do have a cell wall, not all cells, such as animal cells, include this layer.A nucleus: Present in eukaryotic cells but absent in prokaryotic cells.Large vacuoles: Common in plant cells but not typically found in animal cells.Chloroplasts: These are found in plant cells and other photosynthetic organisms but not in animal cells.

If the total amount of energy in the producer level ecosystem is 40,000 kilocalories how much energy is available for the first level consumers?

Answers

Each level causes a loss of 90 percent of the overall total due to the production of heat and energy. In this case, with 40,000 kcal available from the producers, this would cause (40,000 * 0.90), or 36,000 kcal to be lost. (40,000 - 36,000) = 4,000 kcal will be available to the first-level consumers in this ecosystem.

Answer:- 4,000 kilo-calories.

Step-to-step-explanation:-

We know that the ten percent rule says that when energy is passed in an ecosystem from one tropic level to the next then only ten percent of the energy will be passed on.

Given: The total amount of energy in the producer level ecosystem = 40,000 kilo-calories.

Then, the amount of energy in the first level = [10% of 40,000] kilo-calories.

⇒ The amount of energy in the first level =[tex]0.01\times40,000[/tex] kilo-calories.

⇒ The amount of energy in the first level = 4,000 kilo-calories.

Is this statement true or false?
Warm colors in a painting give it s cool, calm or sad mood.

Answers

warm colors are calming and soothing,It just creates a soothing environment. :) Hope this helps! So it is calm

Which area of the brain is the staging area for skilled motor activities?

Answers

They are usually in the left hemisphere. special motor speech area that directs MUSCLES in speech production.
They receive info from general sensory receptors in skin.

Explain why mining soil loss on sloping land is better achieved by measures that retain much of the original vegetation cover rather than extensive clearance followed by replanting

Answers

It is studied that replanting after extensive clearance does not reduce the mining soil loss. By keeping the original vegetation cover, the soil is not being exposed to erosion or is not being dug which avoids times of excessive water penetration and land sliding as well as normal erosion from the slop gradient.

What characteristics of hair differ in the human population?

Answers

Characteristics of human hair such as length, curliness, density, and color are some of the different factors in classifying human hair. Hair can also be classified as to where it grows (such as terminal and vellus hair), and when it grows (like lanugo hair for infants in the womb).

Spasms of the face and extremities with slowly waving hands and feet are symptomatic of:

Answers

Huntington's disease. This disease is an inherited dementia that affects the normal body movements, and causes lack of coordination; it may also affect some mental abilities and and some points of personality.
These symptoms such as the spasms of the face and extremities, and waving of the hands and feet are a result of the hypotonia and muscle weakness.

Which of the following is NOT a benefit of GMOs They can resist disease. They require less fertilizer. They grow faster. They create superweeds.

Answers

Answer: They create superweeds

Explanation:

The creation of superweed by genetically modified plants is not a benefit of GMOs. Superweed can be defined as the weeds that has become resistant to the effect of herbicides.

These weeds have become a problem for farmers as they occupy the space and nutrient and are also not removed by herbicide.

These weeds are produced by the genetically modified plants and crops which is not a benefit of it.

The one that is NOT a benefit of GMOs is they create superweeds and the correct option is option 4.

Genetically modified organisms (GMOs) offer several potential benefits. They can increase crop yield by making plants resistant to pests, diseases, and environmental stressors. This can help address food security challenges and reduce reliance on chemical pesticides.

GMOs can also be engineered to have enhanced nutritional value, addressing nutrient deficiencies in certain populations. They may require less fertilizer and water, contributing to more sustainable agricultural practices.

Additionally, GMOs can extend the shelf life of crops, reducing food waste. However, it is important to consider potential risks, such as environmental impacts and the need for proper regulation and safety assessments to ensure the responsible and ethical use of GMO technology.

Thus, the ideal selection is option 4.

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The oxygen end of the molecule has a slightly negative charge while the hydrogen ends of the molecule have a slightly positive charge. The composition and polar covalent nature of water allow water molecules to be attracted to and form _________.

Question 12 options:

Hydrogen bonds with other water molecules.

Covalent bonds with non-polar molecules.

Ionic bonds with free radial ions.

Answers

Hydrogen bonds with other water molecules.

Why is classification subject to change?

Answers

Classification is subject to change because science is an evolving subject. New things are discovered every year and thus changing the way we understand the world around us.

Final answer:

Classification in biology is ever-changing due to increased understanding of microorganisms, advancements in genetic analysis, and the limitations of existing classification systems. It is constant work to accurately portray organisms' relationships and their true evolutionary history. This is illustrated in the example of the prokaryotic species splitting into Archaea and Bacteria.

Explanation:

Classification in biology is subject to change due to our continuously evolving understanding of organisms. This is particularly evident in our ever-changing comprehensions of microorganisms and phylogenetic modeling concepts, as well as advancements in genetic analysis. Many disciplines within biology, including fossil study, DNA analysis, and the study of body part structures, all contribute to building and updating the "tree of life" or, in other words, the classification system used for organisms.

Limitations of classification systems like the Linnaean system are another factor that necessitates changes. Some species can exhibit mimicry and have different forms in different stages of their life, making them difficult to identify based on physical characteristics alone. This is where new models of relationships among organisms become important.

Recent advancement in genetic analysis has challenged some earlier taxonomic classifications. A significant example includes the separation of prokaryotic species into Archaea and Bacteria, due to their vast genetic differences. Therefore, continuous updates in classification are mandatory to reflect true evolutionary relationships.

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Migration and hybridization between individuals of adjacent populations causes gene ______.

Answers

Migration and hybridization between individuals of adjacent population causes gene Flow.

What are some factors that can regulate enzyme activity?

Answers

Feedback inhibition... where the product of a reaction becomes a competitive inhibitor in order to block more substrate from entering the active site.

Allosteric inhibition... certain enzymes have regions on them away from the active site where special allosteric inhibitor proteins can bind to which change the shape and overall function of the enzyme. This is a form of noncompetitive inhibition.

Other factors could be ph, temperature, amount of substrate/enzyme...

I NEED HELP QUICK, PLEASE !!

Which box depicts the simplest level of organization?
A) P
B) Q
C) R
D) S

Answers

Cells are the most simple level of organization, as tissues contain cells, organs contain tissues and systems contain organs, so R would be your answer.

I believe C. (or R)

Cells are the most simplistic structures of the human body. They're like the building blocks of you're whole body!

I hope this helped you! :)

All organisms perform _____, whether or not oxygen is present.

A). Glycolysis
B). Aerobic respiration
C). Photosynthesis
D). None of the above

Answers

Answer: Glycolysis

Explanation:

Glycolysis is an universal process which takes place in all the organism from bacteria to humans. It can occur whether oxygen is present or not. It is the first step of cellular respiration that takes place in cytosol.

During glycolysis, breakdown of the glucose into pyruvate occurs with the formation of two energy molecules of ATP and two NADH molecules.

Thus, the correct answer is option (A).

What types of movements do we see among the lipids in the membrane?

Answers

Most membrane channels allow passage by simple diffusion of small inorganic ions of a specific type and may also be voltage gated. The solute binds to a protein carrier on one side of the membrane and is released on the other side after the transporter undergoes a change in shape, the movement of molecules across a cell membrane from a region of their lower concentration to a region of their higher concentration in the direction against some gradient or other obstructing factor.

An older female client tells the nurse in the clinic that she has a cystocele that was diagnosed a year ago. she has urinary frequency and burning on urination. the client asks, "the primary healthcare provider wanted me to have surgery for the cystocele last year; but, i can manage with peripads. it won't hurt not to have surgery, will it?" how should the nurse respond?

Answers

Cystocele is a medical condition also known as Anterior Prolapse or a Prolapsed bladder. This condition arises in women when the the supportive tissues between the urinary bladder and the vaginal wall is torn away during childbirth or weakens that causes the bladder to come out in the vagina. It may lead to bladder infection, difficulty during urination and frequent urination. The treatment of cystocele depends upon its severity.
In case of the older female client the cystocele is causing discomfort and she has already taken the self care measurement by using peripads.
She is managing the disease with the peripads and wants to avoid the surgery.

The nurse should explain the severity of the disease and explain her about how she has managed the disease with self care since last year. The nurse should explain the benefits associated with the surgery and how can she be relaxed in the coming years after surgery.

DNA replication occurs prior to meiosis and _________.
A. mitosis
B. cytokinesis
C. transcription

Answers

A. Mitosis is the correct answer.

DNA replication occurs in the two major types of cell division: mitosis and meiosis.

Mitosis is the splitting of a normal cell into two daughter cells and involves complete replication of the cells DNA to produce two identical copies. Meiosis is a specialised and more complex two-stage form of cellular division related to sex cells and involves DNA replication followed by an exchange of DNA material within/between the chromosomes to mix genes from both parents and produce daughter cells with half the number of chromosomes as the original parent cell. Animal sperms and eggs are examples of cells produced by meiosis and contain half the number of chromosomes as normal cells. When combined during fertilization the egg and sperm produce a cell with the full compliment of chromosomes.

Cytokinesis is a part of the cellular life cycle that is related specifically to the division of the cytoplasm (basically the "soup" of material inside the cell). It is part of the cellular division process but not specifically related to nuclear division (i.e. DNA replication).

Transcription relates to the production of RNA from DNA which is then used for protein synthesis. DNA is not replicated during the transcription process, rather, this is a separate process critical for the production of proteins by the cell.

A cell with a predominance of rough endoplasmic reticulum is most likely ________. a cell with a predominance of rough endoplasmic reticulum is most likely ________. producing large quantities of carbohydrates for storage in the vacuole producing large quantities of proteins for secretion producing large quantities of proteins in the cytosol producing large quantities of carbohydrates to assemble an extensive cell wall matrix

Answers

The answer to this question would be: producing large quantities of proteins for secretion.

A cell with many rough endoplasmic reticulum has a high protein synthesis capability. This will make the cell able to produce many proteins like enzyme. One example of this type of cell will be pancreas cells. This cell will need many enzymes to digest food that you eat so it will need many ER to produce it.

A cell with a predominance of rough endoplasmic reticulum is most likely producing large quantities of proteins for secretion.

FURTHER EXPLANATION

The endoplasmic reticulum is the organelle which is responsible for the modification of proteins synthesized by the ribosomes and the production of lipids. There are two sections of the endoplasmic reticulum: rough endoplasmic reticulum and smooth endoplasmic reticulum.

The rough endoplasmic reticulum is where the modification of proteins that will be transported out of the cell takes place. It is called “rough” because it looks like it is studded on its surface with ribosomes where proteins are synthesized. These proteins get modified in the rough endoplasmic reticulum through addition of side chains or folding. Phospholipids are also made in the rough endoplasmic reticulum. These are important components of cellular membranes. All the modified proteins and phospholipids are transported out of the rough endoplasmic reticulum to their destinations via the vesicles.

The smooth endoplasmic reticulum, meanwhile, is the site for carbohydrate, steroid and lipid synthesis. It is considered smooth because of the limited number or absence of ribosomes on its surface.

Producing large quantities of carbohydrates for storage in the vacuole

FALSE: carbohydrates synthesis is not a function of the rough endoplasmic reticulum; the rough endoplasmic reticulum modifies proteins that are for extracellular use.

Producing large quantities of proteins for secretion

TRUE: this is exactly what the rough endoplasmic reticulum does.

Producing large quantities of proteins in the cytosol

FALSE: protein synthesis happens in ribosomes which are floating on the cytosol; proteins on the surface of the rough endoplasmic reticulum are transported outside the cell.

Large quantities of carbohydrates to assemble an extensive cell matrix

FALSE: carbohydrate synthesis is not a function of the rough endoplasmic reticulum

LEARN MORE

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Keywords: rough endoplasmic reticulum, protein synthesis

which fitness activity is characterized by constant pushing and pulling against resistance? rowing cross-country skiing swimming cycling stair climbing

Answers

the fitness activity is rowing due to the force of the paddle against the water.

Answer:

Option A

Explanation:

In Rowing a person pushes or pulls the paddle against the resistance of machine belt

In Gyms , a rowing machine is used for rowing which is a form of cardiovascular exercise that enhances the muscle strength and shape there by making it large and lean.

The work out of upper and lower body is done perfectly by rowing and also it increases the endurance capacity and strength of the body

Hence, option A

How much does a gallon of blood weigh in pounds?

Answers

8.85 pounds because of its density

A gallon of blood usually weigh around 8.34 pounds but can be slightly above.

What is Blood

Blood is a vital fluid that circulates throughout the human body, delivering essential substances and removing waste products. It is composed of various components, including red blood cells, white blood cells, platelets, and plasma.

Red blood cells, or erythrocytes, are the most abundant cells in the blood. Their primary function is to transport oxygen from the lungs to the body's tissues and carry carbon dioxide, a waste product, back to the lungs.

White blood cells, or leukocytes, play a crucial role in the immune system. They help defend the body against infections, diseases, and foreign invaders by identifying and eliminating harmful pathogens or abnormal cells.

Platelets, or thrombocytes, are involved in blood clotting. When there is an injury, platelets aggregate at the site and form a clot, preventing excessive bleeding.

Plasma is the liquid component of blood, making up about 55% of its total volume. It is a yellowish fluid that carries nutrients, hormones, antibodies, waste products, and other essential substances throughout the body. Plasma also helps regulate body temperature and maintain proper pH balance.

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Of 111 prisons, only _________ have complete air conditioning.

Answers

Penitentiaries managed by the Texas Department of Criminal Justice only 21 out of 111 offer full air conditioning to its convicts. Last summer, four prisoners pass away from heat stroke or hypothermia. This was according to New York Times on June 26, 2012.

The area of the cortex responsible for visual-spatial functions and awareness is the __________.

Answers

Answer: "parietal association cortex" .
___________________________________________________

Final answer:

The parietal lobe, specifically the visual association cortex areas V2 and V3, is responsible for visual-spatial functions and awareness, working with the ventral and dorsal streams for complex visual processing.

Explanation:

The area of the cortex responsible for visual-spatial functions and awareness is the parietal lobe, specifically within the regions known as the visual association cortex. This area encompasses Brodmann's areas, such as area V2 and V3, which surround the primary visual cortex (area V1). The visual association cortex develops more complex visual perceptions by adding color and motion information and coordinates with the temporal and parietal lobes through two separate streams of processing: the ventral and dorsal streams. The ventral stream identifies visual stimuli and their significance, while the dorsal stream accurately locates objects in space and assists in guiding bodily movements in response to visual inputs.

When no cause is found for recurrent seizures, the animal is said to have symptomatic or secondary epilepsy.
a. True
b. False?

Answers

It has been a while since I studied this, so im not 100% positive, but it is true, please tell me if I managed to get it right, and also tell me how you did.

The main difference between desert and tundra biomes is _____. moisture content of the air limited topsoil amount of precipitation temperature

Answers

The main difference between desert and tundra biomes is Temperature. Moisture content of the air limited topsoil amount of precipitation temperature.

Answer:

temperature

Explanation:

Certain drugs, known as angiogenesis inhibitors, are effective anti-cancer drugs because they cut off the blood supply to tumors. Without blood supplying fresh oxygen and nutrients to the cancerous cells, the tumors cannot survive. Given this information, angiogenesis inhibitors will be least effective in treating tumors in which kind of tissue?

a) epithelial tissue
b) connective tissue
c) nerve tissue
d) muscle tissue

Answers

a. epithelial tissue or nerve tissue

The answer is A, you can't cut the blood supply because the epithelial tissue is on blood vessels and organs, so you can't cut it.

A(n) _____ includes all living and nonliving things in an environment.

A. community
B. ecosystem
C. population
D. landform

Answers

Don't understand how this was particularly hard; I feel people are just lazy.

The answer is ecosystem.
This is because c refers to a single animal or species. (i.e. population of wolves in said ecosystem.)
Community would be specifically the animals living in an area.
And a landform is the natural feature of a solid surface.

An ecosystem includes all living and nonliving things in an environment. Hence the correct option is b.

An ecosystem encompasses all living and nonliving components within a specific environment, working together as a functional unit. It includes not only the various plant and animal species (populations) present but also the physical factors such as soil, water, climate, and geological features (landforms) that interact with these organisms. Ecosystems are characterized by the flow of energy and the cycling of nutrients, with different species playing roles in these processes.

For instance, plants capture sunlight and convert it into energy through photosynthesis, herbivores consume plants, and carnivores prey on herbivores, forming complex food webs. Additionally, the nonliving components, like water and soil, influence the distribution and abundance of species. Ecosystems vary in size, from a small pond to a vast rainforest, but they all share the fundamental principle of interconnectedness, where the living and nonliving components interact and influence each other's dynamics. Understanding ecosystems is crucial for ecological studies, conservation efforts, and managing environmental resources sustainably. Hence the correct option is b.

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________ are the body's primary and most immediate source of energy. fats carbohydrates proteins

Answers

Hello There!

Carbohydrates are the body's primary and most immediate source of energy.

This is because carbohydrates are broken down by an enzyme called carbohydrase into glucose. Glucose is the immediate energy source.

Hope This Helps You!
Good Luck :)

- Hannah ❤

Other Questions

The planet Mars, I scarcely need remind the reader, revolves about the sun at a mean distance of 140,000,000 miles, and the light and heat it receives from the sun is barely half of that received by this world. It must be, if the nebular hypothesis has any truth, older than our world; and long before this earth ceased to be molten, life upon its surface must have begun its course. The fact that it is scarcely one seventh of the volume of the earth must have accelerated its cooling to the temperature at which life could begin. It has air and water and all that is necessary for the support of animated existence. H. G. Wells, The War of the Worlds, 1898 What does this passage from The War of the Worlds lead you to infer about the narrator? A.He is interested in the Martians. B.He doesn't know what is happening. C.He is well educated and smart. D.He is scared. Read these sentences from "The Cask of Amontillado."I struggled with its weight; I placed it partially in its destined position. 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