Question

Klinefelter’s Syndrome has
A)44+XXY
B)44+XO
C)45+XY
D)66+XXY

Answer 1

It is a genetic disorder in males. In this, a male baby is born with one extra X chromosome. 1 out of 1000 males have this syndrome. When there is a mistake in the formation of sperm or the egg, it results in having one extra chromosome.

Complete answer
Males have two types of chromosomes X and Y. When an extra chromosome adds, it causes physical changes in the male.
-Klinefelter syndrome is mostly due to the mistake in the formation of sperm or egg. Most of the time the error is happening in the formation of sperm. When the woman is pregnant after the age of 35 she has more chances of having a baby with this syndrome.
-Klinefelter syndrome is a chromosomal abnormality in which one extra X chromosome is present in the males(XXY).
-Normal people have 46 chromosomes in each cell. The last two chromosomes being the sex chromosomes. Females have two X chromosomes (44+XX) and males have one X and one Y-chromosome (44+XY). When one extra copy of a gene adds on X chromosomes (44+XXY). Then this causes some physical changes in males which are known as Klinefelter syndrome.

Additional information
-Symptoms of Klinefelter syndrome include enlarged breasts, wide hips, high pitch voice, minimal facial and body hairs.
-Children having this syndrome, their developmental process delays like in motor skills such as sitting, standing, and walking.
-The males who are having this syndrome are usually given testosterone(male sex hormone) for sexual enhancement.

So, the correct answer is, "44+XXY".

Note:
-It is chromosomal abnormalities that affect both the physical and intellectual development of a child.
-Boys and males with this syndrome have a reduced amount of testosterone. The Klinefelter syndrome is the most common example is Barr’s body where the person is having 47+XXY chromosomal composition with a single Barr body and if the composition is 47+XXX then there will be two Barr bodies.