The blood group b is almost absent in native americans, whose ancestors arrived in very small numbers about 10,000 years ago. which factor is responsible for this phenomenon?

a)migration effect

b)founder effect

c)bottleneck effect

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

How can an organ, such as the lungs, work for multiple body systems?

What are characteristics of minerals? select 3 choices