AP BIOLOGY

Detailed explanation-1: -Diploid cells or meiocytes have 16 chromosomes. When the meiocytes divide, forming gametes, the chromosomes become half (8). As a result, the number of chromosomes in the gametes of onions are 8 in number while the chromosome number in diploid cells of the onion is 16.

Detailed explanation-2: -Diploid means two sets of chromosome and haploid is one set. Since here the diploid set is 16 thus one set will be half it, i.e, 8.

Detailed explanation-3: -Since the onion (Allium cepa) is a diploid organism having a haploid genome size of 15.9 Gb, it has 4.9x as much DNA as does a human genome (3.2 Gb).

Detailed explanation-4: -2n = 16, n is the haploid number of chromosomes. 2n = 16, it means n = 8. The haploid number of chromosomes is 8.

Detailed explanation-5: -Haploid cells only contain half the number of chromosomes (n). So you just divide 8 by 2, which equals 4.