Ask Question
2 April, 17:14

In a large, randomly mating population with no forces acting to change gene frequencies, the frequency of homozygous recessive individuals for the character extra-long eyelashes is 90 per 1000, or 0.09. What percentage of the population carries this trait but displays the dominant phenotype, short eyelashes

0
Answers (2)
  1. 2 April, 18:38
    0
    16.38%

    Step-by-step explanation:

    Given

    Frequency of homozygous recessive individuals for the character extra-long eyelashes is 90 per 1000

    Let p = Probability of homozygous recessive individuals having character extra-long eyelashes = 0.09

    p + q = 1 where q = Probability of homozygous recessive individuals not having character extra-long eyelashes

    0.09 + p = 1

    p = 1 - 0.09

    p = 0.91

    The frequency of the carrier individual is calculated by npq

    Where n = mating partners = 2

    Frequency = 2 * 0.09 * 0.91

    Frequency = 0.1638 or 16.38%
  2. 2 April, 18:59
    0
    The percentage of the population carries this trait but displays the dominant phenotype, short eyelashes is the frequency of hetrozygous individuals which is

    0.42 or 42 %

    Step-by-step explanation:

    To solve the question, we note that

    p²+2pq+q²=1 and p + q = 1

    where

    p = frequency of the dominant allele

    q = frequency of the recessive allele

    p² = frequency of homozygous dominant allele

    q² = frequency of homozygous recessive allele

    2·p·q = frequency of hetrozygous individuals

    The frequency of the homozygous recessive individuals q² is 0.09

    Therefore the frequency of q = √ (0.09) = 0.3, therefore p = 1 - 0.3 = 0.7

    The percentage of the population carries this trait but displays the dominant phenotype, short eyelashes is the frequency of hetrozygous individuals or 2*p*q = Ae = 2*0.3*0.7 = 0.42

    → 0.42 * 100 = 42 %
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “In a large, randomly mating population with no forces acting to change gene frequencies, the frequency of homozygous recessive individuals ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers