Human Reproduction Important Questions for CBSE Class 12 Biology Fertilisation, Pregnancy and Embryonic Development 1. Fertilisation is the process of fusion of a sperm with an ovum. (i)Semen of a male is transferred by the penis to the vagina of female during copulation (coitus) and is called insemination. (ii)Spermatozoa move through the cervix, enter the uterus and reach … [Read more...]