Final Answer:
a. True. Human populations typically exhibit substantial genetic diversity within a population comparable to or exceeding the diversity observed among populations from different regions.
Step-by-step explanation:
The statement is true, reflecting the genetic diversity observed within and among human populations. While individuals within a population share a common gene pool, the extent of genetic diversity within a population can be significant due to factors like mutation, recombination, and gene flow. This diversity is influenced by historical, geographic, and demographic factors. Human populations exhibit remarkable genetic variation within local groups, and this diversity is often comparable to or greater than the variation observed between populations from different regions.
Understanding the patterns of genetic diversity is essential in fields like anthropology, genetics, and medicine, contributing to insights into human evolution, migration, and susceptibility to certain diseases.
Option A is the answer.