Which one of the following is a chromosomal disorder?

Due to non-disjunction of chromosomes during spermatogenesis,sperms carry both sex chromosomes $(22A + XY)$ and some sperms do not carry any sex chromosome $(22A + O)$. If these sperms fertilize normal eggs $(22A + X)$,what types of genetic disorders appear among the offspring?

$A$ chromosome complement with $2n-1$ is called as:

Based on Lyon's hypothesis,what will be the number of Barr bodies found in a human female suffering from Down's syndrome?

$A$ cross between a white-eyed female and a red-eyed male Drosophila gives red-eyed females and white-eyed males. Occasionally,the cross gives white-eyed females and red-eyed males. This is due to:

Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage?