Why do birth control pills contain hormones?

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation

Can a trait be both polygenic and have multiple alleles? explain why or why not.

Which tool could you see a plant cell? a. a filter b. a microscope c. a microwave d. an electromagnet