Question

Scientists hypothesize that humans have undergone at least two bottleneck events. The second is thought to have occurred at the Bering land bridge (Beringia) between Asia and North America during the Pleistocene ice age.
Which of the following could test the hypothesis?

• A. Compare the genome size of Native American populations to African, Asian, European, and Middle Eastern populations.
• B. Compare heterozygosity from Native American populations to African, Asian, European, and Middle Eastern populations.
• C. Conduct archeological digs in the Beringia area to check for a written record of a major natural disaster.
• D. Test the variation within the genome of humans to variation with the genome of other mammals.

Answer 1

The correct option is B Compare heterozygosity from Native American populations to African, Asian, European, and Middle Eastern populations.

With every bottle neck effect the genetic variability will decrease, since humans had undergone two or more bottleneck effects the inbreeding of theses populations, the individuals will have reduced heterozygosity while increased homozygosity

So, the correct answer is 'Compare heterozygosity from Native American populations to African, Asian, European, and Middle Eastern populations'