Question

Define the terms:
Genetic drift
Homologous organs

Hint:

Genetic drift is significant in small populations; homologous organs reflect evolutionary divergence.

Answer 1

i. Genetic Drift: Random changes in allele frequencies in a population, especially in small populations, leading to loss or fixation of alleles independent of natural selection.
ii. Homologous Organs: Organs with similar structure and embryonic origin but different functions, indicating common ancestry (e.g., human arm and whale flipper).
Answer: i. Genetic drift is random allele frequency change; ii. Homologous organs share origin but differ in function.