Question
Biology Question on Principles of Inheritance and Variation
In man which of the following genotypes and phenotypes may be the correct result of aneuploidy in sex chromosomes
A
22 pairs + XXY males
B
22 pairs + XX females
C
22 pairs + XXXY females
D
22 pairs + Y females
Answer
22 pairs + XXY males
Explanation
Solution
Aneuploidy is the condition of cells having more or less than integral multiple of typical haploid chromosome number. Thus, 22 + XXY is an extra sex chromosome due to non-disjunction of a pair of sex chromosome either in an ovum or sperm.