Question

after a zygote is formed, how does it mature into a fetus ?

Answer 1

Answer) zygote is formed after the fusion of male and female gamete or we can say that it is formed after the process of fertilisation.

The development of foetus occurs in different stages by the process of special kind of Cell division also known as cleavage .

In which the number of cell increase but the size will remain same

The first stage is morula a solid ball like structure mass of 16 celss which eventually develops into blastula and forms a cavity which is known as blastocoel this blastula forms a outer layer known as trophoectoderm and inner cell mass which converts in gastrula this is the stage when the different layers are formed which is known as germ layers ( ectoderm, mesoderm,endoderm) .

After this neurala is formed which leads to. The formation of brain and spinal cord and slow the number of cells increases which finally forms a developed foetus