If a father and son are both defective in red-green colour vision, is it likely that the son inherited the trait from his father?  Comment.

2

(a)

In our society, a woman is often blamed for not bearing a male child.Do you think it is right? Justify

2

(a)

The pedigree chart given below shows a particular trait which is absent in parents but present in the next generation irrespective of sexes.
Draw your conclusion on the basis of the pedigree.

2

(a)

How is the child affected, if it has grown from the zygote formed by an XX-egg fertilised by a Y-carrying sperm? What do you call this abnormality?

2

(a)

A woman of 47 years delivered an abnormal child with a flattened nasal bridge and mouth partially open with a large protruding tongue. Name this genetic abnormality. What causes this condition?

2

(a)