NEET2015Botany-Principles of Inheritance and Variation
NEET 2015 Botany Chromosomal Disorders MCQ Question
Type: MCQ-conceptual-Medium-Class 12
An abnormal human baby with ‘XXX’ sex chromosomes was born due to
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
Correct Answer
Option A
Detailed Explanation
The presence of an extra X chromosome (XXX) is due to nondisjunction during the formation of ova in the mother.
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