Why does DNA condense into chromosomes before entering the M phase (mitosis) of
the cell cycle?

Describe how an electric generator works

Why is excretion necessary to maintain homeostasis?

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.