Why are chromosomes not always visible?

Why are adults bigger than they were as children biology

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

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.