Q. What is the number of sex chromosomes in humans?
Solution:
There are 46 chromosomes (23 pair) in human beings. Of these, 44 are somatic chromosomes and two are sex chromosomes. A somatic chromosome pair contains two identical chromosomes. Thus in human beings there are 22 pairs of somatic chromosomes.
Sex chromosomes are of two types. They are called X chromosome and Y chromosome. Females have two X chromosomes and males have one X chromosome and one Y chromosome. ie., the genetic makeup of female is 44 + XX and that of male is 44 + XY.
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