NEET BIOLOGY

Detailed explanation-1: -Fertilization. Once the haploid male and female gametes meet and fuse together to form a zygote, this is known as fertilization or syngamy. This can occur either outside the body called external fertilization or inside the body called internal fertilization.

Detailed explanation-2: -The stages of fertilization can be divided into four processes: 1) sperm preparation, 2) sperm-egg recognition and binding, 3) sperm-egg fusion and 4) fusion of sperm and egg pronuclei and activation of the zygote.

Detailed explanation-3: -Fertilization is defined as the union of two gametes. During fertilization, sperm and egg fuse to form a diploid zygote to initiate prenatal development. In mammals, fertilization involves multiple ordered steps, including the acrosome reaction, zona pellucida penetration, sperm–egg attachment, and membrane fusion.

Detailed explanation-4: -A germ cell is any biological cell that gives rise to the gametes of an organism that reproduces sexually. The first step in sexual reproduction at the cellular level is formation of specialised germ cells to produce gametes.

Detailed explanation-5: -Sexual reproduction consists of a set of events. We can divide it into three stages: Pre-fertilization, Fertilization, and Post-fertilization.