Which chromosomal aberration does the following figure indicate?

Choose the correct answer regarding the following statements:
$(i)$ Sickle-cell anaemia is controlled by three pairs of alleles.
$(ii)$ Trisomy is a chromosomal disorder.
$(iii)$ $47$ chromosomes are present in a person having Turner's syndrome.

Gynaecomastia is the symptom of

Down syndrome is caused by an extra chromosome in the $21$st pair. What percentage of offspring from an affected mother and a normal father will show the effect of this disorder (in $\%$)?

$A$ person having $45$ chromosomes where the $Y$ chromosome is absent. Such a condition is known as

The Barr body is observed in