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
Marina CMI [18]
2 years ago
6

A rare genetic disease which is due to a recessive allele (a) and that is lethal when homozygous, occurs within a specific popul

ation at a frequency of one in a hundred thousand. In other words, one out of a hundred thousand individuals are homozygous recessive with the disease. How many individuals in a town with a population of 20,000 can be expected to carry this allele?
Biology
1 answer:
valkas [14]2 years ago
5 0

Answer:

40 individuals

Explanation:

The homozygous recessive percentage is equal to q2.

Recessive genotype frequency, q 2 is 1/1000000  = 0.000001  

therefore, q = \sqrt{q2}  = \sqrt{0.000001 }  = 0.001 =  allele "a" frequency  

and p + q = 1, thus, p = 1 – q = 1 – 0.001 = 0.999  

thus, the frequency of allele a = q = 0.001  and the frequency of allele A = p = 0.999

Carriers are heterozygous and are equal to 2pq.  

So, 2pq = 2  x 0.999 x 0.001 x  20,000 = 39.96 (round of to 40)

Hence, 40 individuals will be expected to carry the recessive allele.

You might be interested in
what happens to the thickness of the uterine lining when the level of the hormone progesterone reaches its highest levels
Alona [7]
The thickness of the uterine lining , becomes very thick...because when the level of hormone progesterone reaches its highest levels. according to Dr.X on yahoo answers.
<span>
</span>
3 0
2 years ago
The nurse is assessing a 6-month-old child. the mother asks when the soft area in her child’s head will go away. what is the bes
Neko [114]
The area is called the anterior fontanel and closes anytime between 9 and 18 months of age.
4 0
3 years ago
At what latitude can the noontime sun be observed in the northern part of the sky
kvv77 [185]
60 hope this helps mark as brain lists
4 0
2 years ago
Question 2<br> What type of mutation is being shown below?<br> ABCDEF ABCCDEF
vlabodo [156]

Answer:

it is the x gene mutation

3 0
3 years ago
Do autotrophs need to perform cellular respiration?
nydimaria [60]
Many autotrophs make food through the process of photosynthesis, in which light energy from the sun is changed to chemical energy that is stored in glucose. All organisms use cellular respiration to break down glucose, release its energy, and make ATP. Autotrophs are also called producers. They produce food not only for themselves but for all other living things as well (which are known as consumers). This is why autotrophs form the basis of food chains.
Yes, autotrophs need to perform cellular respiration.

4 0
3 years ago
Other questions:
  • Complete the sentences to describe how nitrogen bases pair up in DNA.
    9·2 answers
  • Which of the following statements about tolerance range is true?
    11·1 answer
  • Which of these is a receptor molecule? A. cell membrane with an integral molecule marked B. There is a specific recess in this m
    7·1 answer
  • John and Pat are identical twins with identical DNA. John works in a movie theater, and Pat works as a lifeguard. They have very
    9·2 answers
  • The modification of proteins occur in which organelle of the cell ...?
    15·1 answer
  • . During development, some cells become liver cells, somet
    12·1 answer
  • What is the high energy molecule formed at the end of cellular respiration called?
    10·1 answer
  • Which of the purely endocrine organs contain modified neurons that produce and secrete neurohormones?
    14·1 answer
  • In a food web, energy is transferred from one organism to another. As energy moves between the trophic levels, only a small amou
    9·1 answer
  • Is there anything the doctor could try to stimulate spermatogenesis? How does the absence of facial hair relate to sterility?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!