AP BIOLOGY

Detailed explanation-1: -In an organism that has 36 chromosomes, at the end of meiosis I, each gamete contains 18 chromosomes, or 36 chromatids.

Detailed explanation-2: -Meiosis results in reduction of chromosome number to one half in the normal diploid cell. Thus, if a cell has 36 chromosome before meiosis. After meiosis the four daughter cells produced will be having 18 chromosomes each.

Detailed explanation-3: -Chromosome analysis revealed that worms belonging to different populations and color morphs, with dividing spermatogonia having 20 chromosomes in the diploid set (2n = 20) (Fig.

Detailed explanation-4: -The number of chromosomes does not correlate with the apparent complexity of an animal or a plant: in humans, for example, the diploid number is 2n = 46 (that is, 23 pairs), compared with 2n = 78, or 39 pairs, in the dog and 2n = 36 (18) in the common earthworm.

Detailed explanation-5: -If the germ cell was diploid with 36 chromosomes, then at the end of meiosis I it should be haploid and have half the number of chromosomes which is 18.