AP BIOLOGY

Detailed explanation-1: -Each parent contributes a gamete-a sex cell that has half of the normal DNA of a regular body cell. In males, the gametes are sperm and in females, the gametes are eggs. When these two gamete combine during fertilization, the result is a zygote, which then continues to develop into an embryo.

Detailed explanation-2: -The eggs and sperm are 1n, and they combine in fertilization to form a zygote (2n). The zygote divides by mitosis to produce a mature human.

Detailed explanation-3: -Sexual reproduction occurs when the sperm from the male parent fertilizes an egg from the female parent, producing an offspring that is genetically different from both parents.

Detailed explanation-4: -In the sexual reproduction of animals and plants, the male and female gametes join to form a single fertilised cell called a zygote, which develops into a new individual with a unique collection of genetic material.

Detailed explanation-5: -Fertilization joins two haploid gametes into a diploid zygote, the first cell of a new organism. The zygote enters G1 of the first cell cycle, and the organism begins to grow and develop through mitosis and cell division.