Question

The expected number of chromosomes in human body cells is 46. Fruit flies have only 8 chromosomes, mulberry trees have 308, and protists can have thousands. Dogs are in the middle of the range, with 78 chromosomes. How many chromosomes are in the sex cells of each of these organisms?

A. always 23

B. always half as many as in the body cells

C. always as many as in the body cells

D. always twice as many as in the body cell

Answer 1

B - always half as many as in the body cells

Step-by-step explanation:

this is because sexual reproduction requires DNA from both parents, each sex cell contains exactly half the amount of genetic information (haploid number) in comparison to a normal body cell (diploid number) as the genetic material combines to form the diploid number of chromosomes when the egg is fertilised