1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
FrozenT [24]
3 years ago
13

Pseudohypertrophic muscular dystrophy is an inherited disorder that causes gradual deterioration of the muscles. It is seen almo

st exclusively in boys born to apparently uneffected parents and usually results in death in the early teens. Is this disorder caused by a dominant or a recessive allele? Is its inheritance sex-linked or autosomal? How do you know? Explain why this disorder is almost never seen in girls.
Biology
1 answer:
tankabanditka [31]3 years ago
8 0

Answer:

This disorder is caused by a recessive allele, its inheritance is sex-linked.

Explanation:

The disorder affects boys born to unaffected parents, this means that at least one of them has to be a carrier of the allele which causes the disease. So, if the allele was dominant, it would express in parents and sons. But, in this case, only is expressed in sons, so it can´t be dominant. Moreover, this condition has a sex-linked inheritance because it is always seen in boys and never in girls. This happens due to boys only have an X chromosome, so if they inherit the recessive allele of the disease, they will express it. On the other hand, girls have two X chromosomes, so if they inherit one copy of the recessive allele, they will be carriers and they won't be affected.  

This disorder is never seen in females because they need to have two copies of the recessive allele. However, to have double copy, they should inherit one copy from their mothers and one copy of their fathers, but boys with the allele are affected and they die in early teens without having progeny.  Therefore, a girl can't have a "carrier-father", so they will never have two copies to express the disorder.

You might be interested in
Sarah recently learned that O2 is found in the Earth’s water bodies. She was amazed to know the proportion of O2 found in the oc
Mamont248 [21]

It has been found that the rainforests are accountable for about one-third, that is, 28 percent of the oxygen of the Earth, however, the majority of the oxygen, that is, about 70 percent in the atmosphere is generated by the marine plants. The left-over two percent of the oxygen comes from other sources.  

The majority of the oxygen comes from the tiny plants in the ocean known as phytoplankton, which lives near the surface of the water and drifts with the currents. Similarly to plants, they perform the process of photosynthesis, that is, they utilize carbon dioxide and sunlight to prepare food, oxygen is the by-product of photosynthesis.  

However, the concentration of the dissolved oxygen, which the water can hold relies on the salinity and temperature of the water. The cold water can withhold more oxygen in comparison to warm water and fresh water can hold more oxygen in comparison to salt water. So, the warmer and saltier the water is, the less will be the oxygen dissolved in it.  


7 0
2 years ago
How many chromosomes will this daughter cell have?
eimsori [14]

Answer:

Answer: 10 Chromosomes

7 0
2 years ago
The endocrine system regulates the body through hormone release. Like the nervous system, what does the endocrine system help ma
Oliga [24]

Answer:

How is the endocrine system related to the nervous system in terms of its regulatory activity?

For one, the endocrine system uses chemical signaling (hormones, produced by glands) while the nervous system uses electrical signaling (neural impulses). The signal transmission of the nervous system is fast because neurons are interconnected, but the functions are more short-lived.

Explanation:

5 0
3 years ago
Some meteroites have the same composition as the earths core
Nataly_w [17]
This is very so true
5 0
3 years ago
Please help..!! what is the answer​
blagie [28]

Answer: it’s the 4th one

Explanation:

1000 g * 345 g if not then the first one but I’m certainly sure it’s the 4th one

5 0
2 years ago
Read 2 more answers
Other questions:
  • The kind of digestion that takes place when you chew your food is_______________.
    11·1 answer
  • What are the three organelles involved in protein synthesis and how do these interact in that process?
    9·1 answer
  • Why is tissue typing necessary before a kidney transplant?
    13·2 answers
  • Which of the following soil samples is the most porous? Click on the picture until it shows the correct answer.
    8·2 answers
  • Which of the following characteristics DNA?
    5·1 answer
  • Microtubules and microfilaments are made from proteins that are shaped like _____.
    14·2 answers
  • A bag of garden soil has a mass of 3 kilograms.
    13·1 answer
  • Who some people leave their homes in Mexico
    5·2 answers
  • Has volcanic eruption impacted the Earth’s wobble enough to impact climate changes in the UAE?
    11·1 answer
  • What is the powerhouse of the cell?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!