Question

1. What are three factors that decrease herterozygosity?

2. How would you expect migratin of rattlesnakes rom California onto Catalina Island to affect allelr frequencies of the rattlesnake population of California and the snake population of Catalina? Why?

3. Islands often show extremely modified organism, compared to their mainland counterparts -- examples include miniature hippos and rhinos, or gigantic birds, lizrds, or tortoises. Give two reasons islands are likely to be strongly affected by geetic drift, and why this might lead to extreme modifications. Then, explain why natural selection might change the organism on an island from the ancestral mianland forms.

Answer 1

1. Three factors that decrease heterozygosity are as follow:-
(i) Nonrandom mating
(ii) drift
(iii)mutation and gene flow.