EVOLUTION
HARDY WEINBERG EQUILIBRIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What percentage of the offspring are homozygous recessive when you cross two heterozygotes for a trait?
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25%
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50%
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75%
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100%
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Explanation:
Detailed explanation-1: -If we cross two heterozygous individuals (Aa), then the percentage of offsprings with recessive phenotype will be: Aa x Aa = AA Aa Aa aa, so recessive phenotypes would be 1/4 = 25%. Thus, the correct answer is option D.
Detailed explanation-2: -If two heterozygotes are crossed, the probability that an offspring will be homozygous recessive is 25% or 0.25. Homozygous dominant: 25% or 0.25.
Detailed explanation-3: -What is the probability of a heterozygous offspring? There is a 50% x 50% = 25% probability that both of the alleles of the offspring are dominant.
Detailed explanation-4: -The answer is 50%. Assume that the homozygous recessive trait is denoted by aa and the heterozygote is Aa.
There is 1 question to complete.