NEET BIOLOGY

Detailed explanation-1: -There are two chromatids for every chromosome. Fruit flies have 16 chromatids during the metaphase stage of mitosis. At the end of mitosis, how many chromosomes does each daughter cell have? There are 32 chromosomes in each daughter cell.

Detailed explanation-2: -Telophase II: During telophase II, cell division begins again in each of the two daughter cells, creating 4 daughter cells. Each of these 4 daughter cells contains 23 chromosomes, making them haploid, and none of the 4 is exactly alike (due to crossing over and independent assortment).

Detailed explanation-3: -Each pair of chromosomes-called a tetrad, or a bivalent-consists of four chromatids.

Detailed explanation-4: -Drosophila melanogaster flies have 4 chromosomes. This common nomenclature shows one chromosome on top and its homologue on the bottom, as the chromosomes would appear during meiosis when contributing gametes.

Detailed explanation-5: -Because meiosis creates cells that are destined to become gametes (or reproductive cells), this reduction in chromosome number is critical-without it, the union of two gametes during fertilization would result in offspring with twice the normal number of chromosomes!