A colourblind child is born to a normal couple.

(a) Work out a cross to show how it is possible.

(b) Mention the sex of this child.

Mrs. Lata Mohan delivered twins – Lalit and Leela in the year 2014. The twins were not of the same gender but were born on the same day and around the same time.

(a) What kind of twins are Lalit and Leela?

(b) Are they monozygotic or dizygotic twins?

(c) Mention the sex chromosomes in each of the body cells of Lalit and Leela.

Based on the image of the Neanderthal Man given below, describe any two characteristic features of this human species.

State the location and function of the prostate gland present in the male reproductive system.