First slide

Genetic Disorders

Question

An abnormal human baby with 'XXX' sex chromosomes was born due to

Moderate

A

fusion of two ova and one sperm
B

fusion of two sperms and one ovum
C

formation of abnormal sperms in the father
D

formation of abnormal ova in the mother.

Solution

An abnormal human baby with 'XXX' sex chromosomes was born due to formation of abnormal ova in the mother. This type of syndrome is very rare and occurs due to defects in meiosis I and II during oogenesis in the mother which leads to production of abnormal ova (XX). The fusion of XX ovum with X sperm results in ‘XXX’ offspring.

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