What is the result of direct competition in nature?

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

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.

Where can dna be found in a prokaryotic cell