Question

. Genetic drift and inbreeding are both possible in small populations. Which of the following statements truly describes possible outcomes of genetic drift and/or inbreeding.

a) Inbreeding alters allele frequencies, decreases frequencies of heterozygotes, decreases genetic variation
b) Inbreeding decreases frequencies of heterozygotes but doesn’t decrease genetic variation
c) Inbreeding alters allele frequencies, alters frequencies of heterozygotes, and decreases genetic variation
d) Genetic drift alters allele frequencies, decreases frequencies of heterozygotes, and decreases genetic variation within populations
e) Genetic drift alters allele frequencies, decreases frequencies of heterozygotes, and decreases genetic variation between populations
f) Both a and e
g) Both b and e
h) Both c and e

Answer 1

Option f is correct - both a and e are correct.

Inbreeding is the phenomenon of small population where close matting occured and chances of heterozyous individual keep on decreasing by 50% and that leads to appearance of homozygous dominant and recessive population. But homozygous recessive mostly cause disease so organism does not survive and hence alter allelic frequency, and also decrease genetic diversity among population.

So option A is correct for inbreeding.

While genetic drift cause suddent loss of any particular type of genotype from small population.this also leads to alter the allelic frequency ,decrease of heterozygous and decrease in genetic variation.

So option E is correct for genetic drift.

Hope it's clear..thanks