Question

SHOW ALL WORK, EVERY STEP Question #1. The Ngorongoro Crater in Tanzania is home to a population of lions. The Ngorongoro lion prides are isolated from the Serengeti lion prides due to the crater's cliff walls. In 1962 a plague of biting flies broke out in the crater and the lion population plummeted from 70 to 8 individuals. Of these 8 surviving individuals 3 were homozygous recessive. Consider this surviving population and 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 frequency of the heterozygotes? d) What mode(s) of evolutionary change do you think will occur in the surviving population following the 1962 crash? Explain your answer e) By 1972 the crater 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? Question #2. In Drosophila melanogaster, fruit flies, the vestigial wing trait is recessive while the normal Page 1 of a 1061 words 11:12 PM 6/10/2018

Answer 1

Howozygous recessive = 3/8 Frequency of aa = 03.375 Frequency of allele a = squareroot 0.375 = 0.612 Frequency of allele A = 0.388 Frequency of genotype AA = 0.15 Frequency of genotype Aa = 2pq = 2 times 0.612 times 0.388 = 0.474 a) fre of homozygous recessive = 0.375 b) fre of homozygous dominant = 0.15 fre of homozygous heterozygotes = 0.474 No of homozygous recessive = 3 No of homozygous dominat = 0.15 times 8 = tiled 1No of homozygous tiled 0.474 times 8 = tiled 4 mode of evdution - homozygous dominant are being decreased dominant allele might be having decreased or lesser fitness