AP BIOLOGY

Detailed explanation-1: -Gametogenesis involves meiosis which results in a haploid number of chromosomes In daughter cells. Thus, the chromosome number is half (n) in gametes. Fertilisation is the step in which the chromosome number becomes diploid (2n) because of the fusion of male and female gametes.

Detailed explanation-2: -Egg and sperm cells have just 23 chromosomes each. That’s half as many chromosomes as regular cells. Through the process of fertilization, egg and sperm join to make a cell with 46 chromosomes (23 pairs), called a zygote.

Detailed explanation-3: -Chromosome number For example, humans are diploid (2n) and have 46 chromosomes in their normal body cells. These 46 chromosomes are organized into 23 pairs: 22 pairs of autosomes and 1 pair of sex chromosomes. The sex cells of a human are haploid (n), containing only one homologous chromosome from each pair.

Detailed explanation-4: –The n represents the haploid condition. During this condition, the cell possesses a half number of chromosomes. For instance, 23 chromosomes represent the haploid (n) condition in humans.-The 2n represents the diploid condition. During this condition, the cell possesses two sets of chromosomes.

Detailed explanation-5: -In humans (2n = 46), who have 23 pairs of chromosomes, the number of chromosomes is reduced by half at the end of meiosis I (n = 23).