A woman gives birth to a son who has type A blood. She has type AB blood. Which of the following can be concluded from this about her parents' blood types? (1 point) a One of her parents had at least one A allele and the other at least one B allele. b One of her parents had type AB blood. c One of her parents had type B blood and the other type A blood. d One of her parents had two A alleles.

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?