Although 2 cells called gametes fuse, the product formed is a single cell called the zygote. Justify.

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. Hence, the product formed is a single celled zygote. zygote is the first diploid cell that is formed by the fusion of male and female gametes resulting in the formation of an embryo.

The zygote rapidly divides after the first 12-24 hours of formation

The cell mass forms a hollow ball during blastulation

Cells start differentiating and form cavities

The three germ layers form during gastrulation

Formation of primitive streak followed by notochord formation

Tubes are formed, making a neurula

The notochord forms the neural plate

The neural plate folds to form a neural tube and neural crest

The mesoderm is divided into axial, paraxial, intermediate and lateral plate mesoderm, which gives rise to different organs.

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