AP BIOLOGY

Detailed explanation-1: -Meiosis starts with a diploid (2n) parent cell that divides to make 4 haploid (n) cells. In sexual reproduction, haploid gametes from two different individuals combine to produce a diploid zygote. The resulting offspring is genetically different from both parents.

Detailed explanation-2: -Germ cells (sperm and egg) are haploid, meaning that during meiosis, the chromosome number doubles to 4N, then divides into 2N, and divides again into 1N. N is the number of chromosome types in the animal. The stages of mitosis and meiosis will be discussed later.

Detailed explanation-3: -The result of mitosis is two identical daughter cells, genetically identical to the original cell, all having 2N chromosomes.

Detailed explanation-4: -In this simple example, a diploid body cell contains 2n = 2 chromosomes. One chromosome came from mom and one from dad.