AP BIOLOGY

Detailed explanation-1: -During the process of fertilization the sperm fuses with the egg cell. The content of the sperm cell is transferred into the egg, to form the zygote.

Detailed explanation-2: -The fusion of the egg and sperm is called fertilization. Fertilization is the process by which the male and female gametes fuse to give rise to zygote.

Detailed explanation-3: -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-4: -Double fertilization is a complex process where out of two sperm cells, one fuses with the egg cell and the other fuses with two polar nuclei which result in a diploid (2n) zygote and a triploid (3n) primary endosperm nucleus (PEN) respectively.