Describe the cytological observation that suggests that crossing over occurs during the first meiotic prophase.

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.

What organelle other than the nucleus houses dna in a eukaryotic cell?

Which enzymes break down carbohydrates?