l) What models) of evolutionary change do you think will occur in the surviving
ID: 277309 • Letter: L
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l) What models) of evolutionary change do you think will occur in the surviving population following the 1962 crash? Explain your answer e) By 1972 the erater lion population had rebounded to its original size In 1984 genetic analyses and photo chronology confirmed that the current 1984 population had descended from only 15 individuals. If only 8 individuals survived the 1962 population crash, how do you account for the other 7 individuals that made up this population of 15 individuals? d to its original size. In 1984 genetic analyses Question #2. In Drosophila melanogaster, fruit flies, the vestigial wing trait is recessive while the normal wing trait is dominant. Vestigial wings are malformed and nonfunctional. Consider a population of fruit lies in which 87% of individuals have normal wings. Answer the following: SHOW ALL YOUR WORK! a) What is the frequency of the homozygous recessive? b) What is the frequency of the homozygous dominant? c) What is the frequeney of the heterozygotes? d) If this were a free-living (wild) population of fruit flies, what mode of evolution do you think would be at work if evolutionary change occurs over the generations? Explain your answer Island is located in the Grulf of Califomia. Desert Bighom sheep were introduced on the island in 1975 with 20 individuals. 4 males and lo females, In 1993 researchersExplanation / Answer
Vestigial wing individuals are homozygous recessive. Frequency of recessive homozygous = q2 = 87% =0.87
q2 = 0.87
Recessive allele frequency (q) = 0.933
Dominant allele frequency (p) = 1-q = 1-0.933 = 0.067
a) Homozygous recessive frequency = q2 = 0.87
b) Homozygous dominant frequency = p2 = 0.0672 = 0.0045
c) Heterozygous frequency = 2pq = 2*0.067*0.933 = 0.125
d) Here, the number of individuals with recessive alleles are more than the number of individuals with dominat allele. So this is selection agtainst dominant allele.
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