Question

Difference between zygote,embryo and foetus

Answer 1

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Answer 2

A zygote is a cell fertilized by the union of the ovum (i.e., egg cell), or the female gamete, and the sperm cell, or the male gamete. It contains the DNA from both its parents. The zygote then multiplies and develops through the process of cell division to form the embryo. The zygote is the first stage of development of the fertilized cell.

The embryo is the first stage of development of the zygote as the fertilized egg goes through a rapid process of cell division. This is when differentiation happens, where the embryo’s cells multiply and take on various functions. The different stages in embryo development are the blastula, gastrula, and organogenesis stages.

A fetus (also called foetus), generally refers to a point in the embryo’s development where it takes on a more human form. This stage generally starts at the gestational age of eleven weeks since the fertilized zygote formed.