Gynecomastia is a symptom of

An abnormal male child is born to normal parents. This child shows a short neck,stubby hands,slanting eyes,a permanently open mouth with a projecting upper lip,and short stature. This abnormality can be attributed to:

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?

Fissured tongue,short stature,and physical or mental retardation are characteristic features of which disorder?

Give examples of disorders caused by sex chromosomal abnormalities and describe them briefly.

Distinguish between: Down's syndrome and Klinefelter's syndrome.