In human beings, the correct sequence

Question:

In human beings, the correct sequence of events during reproduction is

(a) gamete formation, fertilisation, zygote, embryo

(b) embryo, zygote, fertilisation, gamete formation

(c) fertilisation, gamete formation, embryo, zygote

(d) gamete formation, fertilisation, embryo, zygote

Solution:

(a) In human beings, sexual reproduction takes place by the combination of gametes, i.e. sperm and egg, formed in male and female, respectively.

The fusion of gametes is called fertilisation.

The fusion forms a zygote, which divides repeatedly to form the embryo. The embryo gets implanted in female uterus for further development to

form foetus.

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