Is changes in allele frequencies due to chance.

Akrabby blind whale has married pearl who has normal vision. oneof their two sons is also colorblind. what arr the genotypes of the parents?

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring