Some types of muscular dystrophy are X-linked recessive disorders. A mother who is a carrier for muscular dystrophy has children with a father who doesn’t have muscular dystrophy.
a. What percentage of their sons will have the disease, and what percentage of their sons will be carriers?
b. What percentage of their daughters will have the disease, and what percentage of their daughters will be carriers?

Show your work with a Punnett Square, using XD to represent the allele not associated with muscular dystrophy and Xd to represent the allele associated with muscular dystrophy. You can copy/paste the blank table below or create a table in the submission box to complete the Punnett square.

Answers

Answer 1

D gene is an X-chromosome-linked gene. a) 100% will have the disease, XdY // 0% will be carriers. b) 0% will have the disease // 100% will be carriers, XDXd.

What are the séx-linked genes?

These are genes that can be found only in the X-chromosome. The inheritance pattern expressed by these genes varies from the one expressed by genes located in autosomal chromosomes.

In the exposed exampe,

- muscular dystrophy are X-linked recessive disorders

- woman ⇒ carrier for muscular dystrophy ⇒ heter0zyg0us ⇒ XDXd

- man ⇒ doesn’t have muscular dystrophy ⇒ X-chromosome with the dominant allele ⇒ XDY

- XD ⇒ chromosome rarrying the dominant allele

- Xd ⇒ chromosomes carrying the recessive allele

Cross: Man x Woman

Parentals) XDY x XDXd

Gametes) XD Y XD Xd

Punnett square) XD Xd

XD XDXd XDXd

Y XdY XdY

F1) 1/2 = 50% of the progeny will express the normal phenotype, XD-

1/2 = 50% of the progeny will have muscular dystrophy, Xd-

100% of the girls will be normal and carriers, XDXd

100% of the boys have muscular dystrophy, XdY

a. What percentage of their sons will have the disease, and what percentage of their sons will be carriers?

Considering only boys,

100% of them will have the disease, XdY0% will be carriers.

b. What percentage of their daughters will have the disease, and what percentage of their daughters will be carriers?

Considering only girls,

0% of them will have the disease, 100% will be carriers, XDXd

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Related Questions

Brown hair is dominant and blonde hair is recessive.

What percent of the offspring will have blonde hair if the parents have the following alleles?

BB

Bb

A. 75

B. 25

C. 50

D. 0

E. 100

Answers

Answer:

If we assume B = Brown and b= blonde, Phenotypically the percent of offspring having blonde hair is D. 0

Explanation:

In general, bacterial
cells are prokaryotic.
Which cells are eukaryotic?

a. Bacterial cells
b. Animal and plant cells

( it’s b )

Answers

Answer:

B . Animal and plant cells

Animal and plant cells are eukaryotic cells.

What are Eukaryotic cells?The region One of the three realms of life is eukaryote; the other two are bacteria and archaea.Organelles that are membrane-bound and found in eukaryotic cells include the nucleus, mitochondria, and endoplasmic reticulum. Protozoa, fungi, plants, and animals are examples of eukaryotic cell-based organisms. The biological domain Eukaryote is where these species are categorized.Animals, fungi, protists, and plants are eukaryotic cells examples. They have chromosomes, which organize their genetic material.Since prokaryotic cells lack a membrane-bound nucleus, eukaryotic cells are the main difference between these two types of creatures. Eukaryotes store their genetic material in their nuclei.

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3
Which of the following statements are true? Choose more than one
answer.

Oxygen is the most abundant gas in Earth's atmosphere

Gases in the stratosphere protect living organisms from solar
radiation

Wavelength affects the color of light

Gases are thicker in the upper levels of the atmosphere

Not all wavelengths of light are scattered by atmospheric
gases

Earth's atmosphere absorbs blue light most efficiently

Answers

Answer:

Oxygen is the most abundant gas in Earth's atmosphere

Explanation:wfnwkfnskfnds

Oxygen is the most abundant gas in Earth's atmosphere

How do creosote plants defend against predators?

by growing in hard-to-reach places

by growing sharp, stinging hairs over their bodies

by producing bad-tasting oil in their leaves

by producing deadly toxins in stems and leaves

Answers

Answer:

The answer should be By growing sharp, stinging hairs over their bodies.

Explanation:

Which statement describes the energy involved in diffusion?

Diffusion requires energy in all cases.
Diffusion requires energy only to move material in through the cell membrane.
Diffusion does not require energy in any situation.
Diffusion requires energy only to move material out through the cell membrane.

Answers

Answer:

Diffusion does not require energy in any situation.

Explanation:

Diffusion does not require energy because it is a form of passive transport.

hello help me with this question thanks in advance don't spam

Answers

Answer:

Explanation:

Advantages to community:

1. Geothermal energy is a renewable energy resource because heat extracted is very small compared to the Earth's heat content.

2. It is reliable and constant source of energy as it can extracted all through the year despite changing weather patterns.

3. Geothermal energy is widely available and it creates new job opportunity.

Disadvantages:

1. Cost of installation of geothermal heat pumps are high.

2. This power plants plants are suitable to particular region and they are far from cities.

Advantage to the environment:

1. It is echo friendly and non-polluting from production to use.

2. Geothermal plants occupy a less space, no-mining or no transportation is require and thus protects the natural environment.

3. There is no wastage or by -products.

Disadvantage:

1. This power plants may trigger earthquakes.

2. Power plant uses lot of water in its processes.

form and function are related. describe how the form of the tracheal wall is related to its four functions

Answers

Given what we know we can confirm that the tracheal wall is related to its function in that it allows it to conduct air in a sealed manner and protect the individual.

What is the function of the trachea?

The primary function of the trachea is to conduct air into the lungs. For this, the trachea is long and narrow, to allow air to flow in a directed manner towards the lungs. The trachea is also "armored" to protect this air flow and is lined with mucus to sweep away any unwanted particles from the air.

Therefore, we can confirm that the trachea is armored and lined with mucus along its long, tube-like shape, which allows this structure to conduct air in a safe, clean, and direct manner directly towards the lungs.

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What is the most interesting
Or surprising thing you learned about the universe and galaxies?

Answers

The most surprising thing about the universe is that it we don’t know when it will end and it could end at any point in time. The most surprising fact about our galaxy is that it would take around 26,000 years to get out of it.

Punnett square for rr and rr parents

Answers

When there are two recessive parents, that means the recessive trait will go into the child. Hope this helps.

Which of the following best describes the relationship between the level of genetic
variation and adaptability?

Answers

Answer:

All adaptations are variations and all variations help organisms survive

Explanation:

hope this helps

Which of the following illustrates the principle of induction in invertebrates?

A. In an embryo, the presence of a notochord beneath the ectoderm results in the formation of a neural tube.
B. A neuron synapses with another neuron via a neurotransmitter.
C. Eye muscles constrict in response to light.
D. Secretion of TSH stimulates the secretion of thyroxine.
E. The maternal parent induces spontaneous expression of recessive genes.

Answers

Answer:

Explanation:

How does the ectoderm that will make up the future eye know to develop into an eye? The cells are "told" to develop into an eye because the nearby retina releases chemical signals that direct the development of the cells. This process is called induction. Choice A depicts a similar situation. The notocord releases chemical signals that tell the overlying ectoderm that it is time for it to become the neural tube. None of the other choices depict the process of induction.

Find a picture or video regarding optical illusions and post a link. Describe what is happening in the eye or brain that creates that illusion!

Answers

Optical illusion occurs when our brain and eyes miscommunication with each other.

Why Optical illusions occur?

Optical illusions happen when our brain and eyes speak to each other in simple language but the interpretation gets mixed-up. For example, our eyes told the brain that something is moving but that's not what the eyes meant to say to the brain which leads to the creation of illusion.

So we can conclude that Optical illusion occurs when our brain and eyes miscommunication with each other.

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HELP, define genetic engineering and Describe how DNA is modified for use in genetic engineering.

Answers

Answer:

Genetic engineering is deliberate modification of genome to gain desired traits.

The main steps of genetic engineering:

Restriction enzymes are used to isolate the required gene leaving it with sticky ends. Sticky ends are a short section of unpaired bases A vector, which is usually a bacterial plasmid or a virus, is cut by the same restriction enzyme leaving it with corresponding sticky ends. The vector and the isolated gene are joined together by ligase enzyme. The vector inserts the gene into required cells. The genes are transferred to animal, plant or microorganism cells, during early development, which allows them to develop with the desired characteristics.

Which one is warmer a normal year or El nino year?

Answers

El Niño year is hotter the the normal year.

what is is the attraction of water molecule to each other

Answers

The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond.

(i need some help here pls)
Before uniformitarianism, what theory was widely accepted?
1.) Uniformitarianism is the only theory
2.) The law of superposition
3.) Catastrophism

Answers

Answer:

3.)CATASTROPHISM

Explanation:

catastrophism suggested the features seen on the surface of earth such as mountains,were formed by large abrupt changes or catastrophes

please help me what organism is the secondary consumer ?

Answers

Answer:

I believe it is the fox

Answer:

It would be most likey the worm dood.. most likely because he is a consumer that would gain his resources from the tree.

Explanation:

Homologous chromosomes may exchange segments; this is called crossing over. Crossing over increases genetic variability. When does crossing over occur?

Question 2 options:

Meiosis II

Mitosis

Both mitosis and meiosis--crossing over may occur at any time during the cell cycle.

Meiosis I

Question 3

In order for meiosis to create four, genetically different gametes, DNA replication must occur. Which of these best describes when DNA replication would occur?

Question 3 options:

prior to meiosis II

prior to meiosis I and meiosis II

prophase I in meiosis I

prior to meiosis I

Question 4 (1 point)
The embryo's development as seen here represents which processes in the development of any multicellular organism?

Question 4 options:

meiosis followed by mitosis.

mitosis and cell differentiation.

protein synthesis followed by meiosis.

meiosis and cell differentiation.

Question 5
Why do some organisms reproduce aseggsually?

Question 5 options:

To rapidly produce like offspring

To increase genetic diversity

To have a variety of offspring at the same time

To get rid of genetic problems while reproducing

Answers

A) Crossing over occurs in : Meiosis I ( D )

B) DNA replication would occur : Prior to meiosis I and meiosis II ( B )

C) The embryo's development represents ; meiosis and cell differentiation ( D )

D) Some organisms reproduce aseggsually ; To rapidly produce like offspring

What is Crossing over and DNA replication

Crossing over involves the swapping of genetic materials, and it occurs in prophase I of meiosis before meiosis II the crossing over of genetic materials are over. while DNA replication is the process whereby DNA make an exact copy of itself during the process of cell division and this process occurs prior to meiosis I and meiosis II

The development of an embryo in the missing diagram represents meiosis and cell differentiation.

Hence we can conclude that the answers to your questions are as listed above.

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Explain why the pattern of differences
that exists from earlier to later fossils in the
fossil record supports the idea that evolution
has taken place on Earth.

Answers

Answer:

Different layers of fossils found in sedimentary layers of the earth show that past species have died off and adapted in order to survive.

Explanation:

Very fast brainlist

One person consumes the equivalent of five cows per year. Five cows consume a total of 39 million Calories of vegetation per year. One person only needs one million Calories a year to survive. Which statement best describes the efficiency of energy transfer in this scenario?

It is very efficient because the person can eat less.
It is inefficient because less energy is needed at the top.
It is very efficient because most energy is made by producers
Only a portion of energy from vegetation makes it to a person.

Answers

Answer:

It is very efficient because the person can eat less.

Explanation:

the common knowledge answer

Only a portion of energy from vegetation makes it to a person. The correct option is D.

What is energy efficiency?

The definition of energy efficiency is the use of less energy to carry out a task or achieve a goal.

Ecological efficiencies at each trophic link determine the food chain efficiency (FCE), which is calculated as the percentage of energy fixed by primary producers that is transmitted to the top trophic level.

The energy supply accessible to trophic level N+1 divided by the energy used by trophic level N is the definition of ecological efficiency.

Only a percentage of the energy from vegetation makes it to a person, which best sums up the efficiency of energy transmission in this situation.

Thus, the correct option is D.

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High-efficiency particulate air (HEPA) filters are designed to remove which sized particles from the environment? 0.1 microns or smaller a) b) 0.3 microns or larger O c) 0.1 microns or larger d) 0.3 microns or smaller

Answers

Answer:

d) 0.3 microns or smaller

HELP PLEASE!

In pea plants, petal coloration of has a complete dominance relationship where purplepetals are dominant over white petals. There are 276 plants, 273 have purple petals.Find: the frequency of the dominant and recessive alleles and the frequency ofindividuals with the dominant, heterozygous, and recessive genotype.

Answers

Answer: See below

Explanation:

In the selected pea plant population, there are total 276 plants out of them 273 have purple petals.

Remaining 276 - 273 = 3

q²= 3/276

q²= 0.010

q = 0.1

p + q = 1

p = 1 - 0.1

p = 0.9

Therefore:

Homo-zygous dominant = p² = 0.9×0.9 = 0.81

Hetero-zygous dominant = 2pq = 2×0.9×0.1 = 0.18

Homo-zygous recessive = q² = 0.1×0.1 = 0.010

_______ tells your cells what to do.

A. Genes

B. parent cells

C. white blood cells

D. Mitochondria

Answers

Genes :- they contain stored information which then orders cells through the process of translation

What are the four features of minerals? (use complete sentences and your own words.)

(NO LINKS PLEASE)

Answers

Answer:

1)All minerals are naturally occuring.

2)They have to have a crystalline structure and a definite chemical composition.

3)They are inorganic.

4)They are a solid.

Explanation:

1-You have to find a mineral in the nature. It cannot be created in a lab.

2-Crystallline structure is the ordered arrangement of ions, molecules, or atoms in an object.

3-Inorganic means that the object has not bonded with carbon.

4-Solid means that it is not fluid and is hard and stable.

Hope this helps! :)

what is cell and what are cell organalles

Answers

Answer:

a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body

so it is like a cell that works in the body but its a (organelles) in side the cell working in it like it is the cell in side the body

horse is called a vertebrate reason scienc subjects

Answers

Answer:

Explanation:All animals with a backbone and skeleton are vertebrates. Horses have backbones and skeletons, therefore they are vertebrates. Animals without a backbone are called invertebrates. Hope this helps

Describe the nutrient cycle. How does soil contribute to this cycle?

Answers

Answer:

The nutrient cycle is a system where matter and energy are transferred between living organisms and non-living parts of the environment. This occurs as animals and plants consume nutrients found in the soil, and these nutrients are then released back into the environment via decease and spoilage

Going long does carbon dioxide last

Answers

Answer:

carbondioxide last in about 300 to a 1000 years in the atmosphere

which of the statements accurately describes how water moves through earth and its atmosphere

Answers

Answer:

A. Liquid water falls from outer space and is absorbed or d*unk by living things. It then evaporates into the atmosphere and forms clouds, which float into space.

Which one of the following is NOT a
characteristic of livings things?
A. must grow and develop
B. must be made of more than one cell
C. must be able to reproduce
D. must have a universal genetic code

Answers

Must have a universal genetic code

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