AP BIOLOGY

Detailed explanation-1: -Overall, meiosis results in the formation of four haploid cells from a diploid parent cell. So if a cell has 12 chromosomes at the end of meiosis I which is reduction division, it means that the parent cell would have had 24 chromosomes in prophase I.

Detailed explanation-2: -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-3: -Hence, an organism with cells 2n=6 would be an organism that is diploid and has 6 chromosomes total. In other words, this organism has 3 pairs of chromosomes. Meiosis is a reduction division in that it produces daughter cells with half the genetic material of the starting cell.

Detailed explanation-4: -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.