AP BIOLOGY

Detailed explanation-1: -The zygote is endowed with genes from two parents, and thus it is diploid (carrying two sets of chromosomes). The joining of haploid gametes to produce a diploid zygote is a common feature in the sexual reproduction of all organisms except bacteria.

Detailed explanation-2: -Their union will result in a zygote that is diploid (2n) and by a process called fertilization.

Detailed explanation-3: -A zygote is diploid (2 copies of each chromosome), just like the original parent organism. In order to grow from a zygote into an adult organism, many more cells must be produced. The zygote goes through a cell division process called mitosis, which produces 2 identical somatic (body) cells from one original cell.

Detailed explanation-4: -Sexual reproduction involves an egg cell being fertilized by a sperm cell to form a new cell called a zygote. The egg cell and the sperm cell both contain one complete set of chromosomes, and thus one copy of the genome, so the zygote contains two sets of chromosomes and two copies of the genome.

Detailed explanation-5: -Fertilization where one of the two sperm nuclei from the pollen tube fuses with the egg nucleus to form a 2n zygote, and the other fuses with the two polar nuclei to form the 3n primary endosperm nucleus and then develops into the endosperm.