Turner’s syndrome is an example of:

Identify the disease on the basis of the following characters:
$(1)$ Short stature with a small round head.
$(2)$ Furrowed tongue and partially open mouth.
$(3)$ Palm is broad with a characteristic palm crease.

The arrangement of chromosomes in the order of decreasing length is termed as:

What is the cause of $Down's$ syndrome?

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?

$A$ mother has Down syndrome,and the father is normal. What is the probability of their offspring having Down syndrome (in $\%$)?