A gene that needs to be present in only one parent to have a fifty-fifty chance of affecting each child is called the gene.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

answer: i feel like it would be 3

explanation:

answer increasing the intensity, duration,and frequency of exercise progressively;