When the chromosome number of a given organism has one additional chromosome in one of the homologous pairs,the condition is known as . . . . . .

The monosomic condition in human beings depicted as $XO$ is referred to as

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

Physical,psychomotor,and mental development is retarded in an individual affected with

$A$ 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:

Describe chromosomal disorders and provide their examples.