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
lakkis [162]
2 years ago
7

Both Duchenne muscular dystrophy and color blindness are caused by recessive alleles. DMD, unlike color blindness, nearly always

occurs in males. Explain why.
Biology
1 answer:
Ronch [10]2 years ago
6 0

Answer: Although both are X-linked recessive conditions, and therefore more likely in males, with the single X-chromosome. The recessive allele in colour blindness occurs at a higher frequency in the population and is a mild condition. Thus colour blindness does occur to a lesser extent in females because it needs the double recessive condition. DMD is a severe, disabling condition with a limited lifespan, and recessive allele frequency much lower, so the double recessive condition in females is very rare.

Explanation: DMD is an X-linked recessive, “nearly always in males” suggest that it also occurs due to a new mutation or some rare condition e.g. double recessive from an affected father and carrier mother, or inactivation of the normal gene in a heterozygote. It is also found that the defective allele is not completely recessive and that female carriers may exhibit mild to moderate effects.

colour blindness is polygenic, although the genes are all X-linked. It is more common in males than females. Females can carry two recessive alleles and so express the phenotype, but this is uncommon because the frequency of the recessive gene is low.

There are similarities in that both are X-linked recessives, therefore commonly expressed in males, who only have one X chromosome. The gene frequency of the colour blindness recessive is much higher than that of DMD, so the double recessive condition, which affects females, is more likely to be seen with colour blindness. In addition, DMD is a severe condition associated with disability and limited lifespan, which reduces the probability of mating between an affected male and carrier female

You might be interested in
_____________contents empty into the small intestine and must quickly be neutralized to prevent damage to the intestinal wall. U
Sonbull [250]

Answer:

Pancreatic juice, NaHCO₃.

Explanation:

The buffers are the chemical solution which neutralizes the acidic effect and the human body also produces the biological buffers which help maintain the pH.

The pancreatic juice secreted by the pancreas gets drained into the duodenum of the small intestine and neutralizes the effect of the acidic content in the stomach bolus.  The pancreatic juice contains the sodium bicarbonate which neutralises the effect of the HCl.

Thus, Pancreatic juice, NaHCO₃ is the correct answer.

6 0
3 years ago
What are somethings that cause mutations in cancer
dmitriy555 [2]

Answer:

mutations cause most cases of cancer. Some acquired mutations can be caused by things that we are exposed to in our environment, including cigarette smoke, radiation, hormones, and diet. Other mutations have no clear cause, and seem to occur randomly as the cells divide.

3 0
3 years ago
Read 2 more answers
In an experiment is it necessary to record which oh the following types of Data?
Julli [10]
Quantitative and systemic data
5 0
2 years ago
Where does lactose hydrolysis occur for lactase-persistent individuals?
Juli2301 [7.4K]
Lactose hydrolysis occurs for lactase-persistent individuals and the people who have a lactase deficiency. Lactose hydrolysis is found in dairy products and also to the various milk products. The process of this lactose hydrolysis is said to be not that complicated.
8 0
2 years ago
I forgot which way is latude
Alex787 [66]
LATitude are the lines that go around the world. They are like a LATter.
Longitude go from the north pole to the south pole.
7 0
3 years ago
Other questions:
  • What’s another name for passive transport
    11·1 answer
  • Seminal fluid, excluding the sperm, is produced by all except ________
    9·2 answers
  • Which gas in Earth's atmosphere helps living things make proteins?
    11·2 answers
  • Two adjacent neurons that communicate with one another are separated by a space. what is this space called?
    5·1 answer
  • Why is a "shell of hydration" important to life?
    13·1 answer
  • 1. Explain what is the "Sea Floor Spread" with examples.
    7·1 answer
  • An allele that is masked when a dominant allele is present.
    13·1 answer
  • PLEASE HELP!!! WILL MARK BRAINLIST!!!!
    11·2 answers
  • What are some things that cause habitat loss?​
    5·1 answer
  • The Drosophila genes for white eyes (w), cut wings (ct), and tan body (t) lie at map positions 2.00, 15.0, and 21.0, respectivel
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!