AP BIOLOGY

Detailed explanation-1: -The male gamete, a sperm, and the female gamete, an ovum, are both haploid and contain 23 chromosomes. [2] As the end result of gamete fusion, a zygote is diploid with 23 pairs of chromosomes (46 chromosomes). Fertilization usually occurs in the ampullary part of the fallopian (uterine) tube.

Detailed explanation-2: -The number of chromosomes in a human sperm is half the number of chromosomes in a zygote, i.e., their ratio is 2 : 1.

Detailed explanation-3: -The ratio is 1:2 of chromosome number between an egg and its zygote. Sperms contain either X or Y chromosome whereas an egg will always have an X chromosome.

Detailed explanation-4: -Through the process of fertilization, egg and sperm join to make a cell with 46 chromosomes (23 pairs), called a zygote. For each chromosome pair, one homologous chromosome came from each parent. They have the same genes arranged in the same order, but there are small variations in the DNA letters of those genes.

Detailed explanation-5: -Fertilization: A Sperm and an Egg Form a Zygote When a sperm cell penetrates and fertilizes an egg, that genetic information combines. The 23 chromosomes from the sperm pair with 23 chromosomes in the egg, forming a 46-chromosome cell called a zygote. The zygote starts to divide and multiply.