Consider a lethal recessive allele in two populations of nile crocodiles. In pop

Question

Consider a lethal recessive allele in two populations of nile crocodiles. In population one it is at a frequency of 0.3. In population two it is at a frequency of 0.05. In which population will it decrease by the greatest amount in the next generation, and why? A- It will decrease most in population one because there will be more homozygotes exposed to selection in that population B. It will decrease most in population two because there will be more homozygotes exposed to selection in that population C It will decrease most in population two because there will be more heterozygotes exposed to selection in that population D. it will decrease equally and at the same rate in each population

Explanation / Answer

Population 1

q2 = 0.3 (lethal alleled crocodile = 2.7)

q = 0.548

p=0.452

p2 = 0.204 (dominant homozygous crocodile = 1.83)

2pq = 0.495 (heterozygotes crocodile = 4.45)

Population 2

q2 = 0.05 (lethal alleled crocodile = 0.45)

q= 0.224

p=0.776

p2 = 0.602 = (dominant homozygous crocodile = 5.41)

2pq = 0.347 (heterozygotes crocodile = 3.123)

so 2nd option is right

you can observe the calculation

as the heteozygotes number increases chancge of getting lethal allele is more so it will not decrease in population rather increases.

In the other way of the dominant homozygotes increases in population, it maintains pure line so lethal allele will decrease gradually.

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