AP BIOLOGY

Detailed explanation-1: -Somatic cells are haploid and sex cells(gametes) are diploid . If the number of chromosomes in the somatic cells of an organism is 24, then the number of chromosomes in its gametes will be 12.

Detailed explanation-2: -Option E is 48. This is the right answer as the diploid set of a haploid of 24 chromosomes will be 24×2=48. So, the total number of chromosomes in an organism with a haploid number of 24 chromosomes will be 48.

Detailed explanation-3: -Since haploid cells have half the number of chromosomes than diploids, the haploid number of chromosomes for a cell whose diploid counterpart has a diploid number of 12 would be 6 (12/2=6). Each haploid cell in this case would possess 6 chromosomes.

Detailed explanation-4: -Through the process of meiotic division, a diploid cell gives rise to four haploid cells. However, during the process of reproduction the haploid cells unite to form a diploid zygote. If any organism has a haploid of 24 chromosomes, the total number of chromosomes in its diploid stage will be 48 chromosomes ( 24x2)

Detailed explanation-5: -In plant-A, 2n= 12, n= gametic chromosome number. This means the number of chromosomes in a gamete of plant A is 6 and gametes will fuse to form a diploid organism having 12 chromosomes in each cell.