Question

(a) Draw a diagram of a human sperm. Label the different components in its head and middle piece region.
(b) Explain the process of fertilisation in human female.

Answer 1

Any 6 correct labelling in head and middle piece 
(b) A sperm comes in contact with zona pellucida layer of ovum and induces changes in the membrane that block the entry ofadditional sperms, secretions of acrosome help the sperm to enter into cytoplasm of ovum (through zona pellucida and plasm membrane) , this induces completion of unequal meiotic division of secondary oocyte which leads to formation of a second polar body and haploid ovum , soon haploid nucleus of sperm and ovum fuse to form zygote (fertilization)