Assertion (A) : The foetus respires but does not breathe.

Reason (R): The maternal blood supplies oxygen to the foetus through placenta.

1. A is True and R is False
2. A is False and R is True
3. Both A and R are True
4. Both A and R are False

Shruti’s mother gave birth to two male babies. Both the babies had a strong resemblance to each other. The doctor said that they have been formed from a single ovum.

(a) What kind of twins are they?

(b) Why are they of the same gender?

Explain the function of corpus luteum when:

(a) ovum is fertilised.

(b) ovum is not fertilised.