Marriages between close relatives and cousins is not advisable because

Options

A. More mutations can occur
B. More recessive defects are likely to appear
C. More chances are there for Rh blood group anomalies
D. More chances are there for multiple births

Answer

B

Explanation

The breeding between loosely related individual is called inbreeding. It is usually avoidable because in this recessive character appear most of the generation and causes inbreeding depression.