Given below are diagrams showing the different stages in the process of fertilisation of an egg in the human female reproductive tract.
Study the diagrams and answer the questions

(i) Arrange the letters given below each diagram in a logical sequence to show the correct order in the process of fertilisation.
(ii) Where does fertilisation normally take place? What is 'Implantation' that follows fertilisation ?
(iii) Mention the chromosome number of the egg and zygote in humans.
(iv) Explain the term 'Gestation'. How long does Gestation last in humans ?
(v) Draw a neat, labelled diagram of a mature human sperm.

Explanation

Chromosome number of egg - 23
Chromosome number of zygote - 46