The man with short eyelashes in Generation II marries a woman with long eyelashes. This woman reports that everyone in her famil
y also has long eyelashes. Can the man and woman be sure that all of their children will have long eyelashes? Explain.
1 answer:
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Answer:
Allele frequency
Normal allele
Mutant r allele
Genotype frequency
Homozygous normal bugs
Homozygous mutant bug
Heterozygous normal bug with one mutant r allele and one normal allele
Explanation:
It is given that 99% of the bugs were killed after the spray of pyrethrum. This suggests that 1% of the bugs that were not killed must be homozygous for the mutant type allele "r"
Thus, the frequency of homozygous "rr" species i.e
From this we can evaluate the frequency of mutant "r" allele.
Thus,
As per Hardy-Weinberg first equilibrium equation,
Substituting the value of q in above equation, we get
Thus, the frequency of homozygous normal bug is equal to
As per Hardy-Weinberg second equilibrium equation-
Substituting all the available values we get -
Allele frequency
Normal allele
Mutant r allele
Genotype frequency
Homozygous normal bugs
Homozygous mutant bug
Heterozygous normal bug with one mutant r allele and one normal allele