THE MOLECULAR BASIS OF INHERITANCE
THE HUMAN GENOME
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
one X chromosome only.
|
|
|
two X chromosomes.
|
|
|
one X and one Y chromosome.
|
|
|
two Y chromosomes.
|
Detailed explanation-1: -Each person normally has one pair of sex chromosomes in each cell. The Y chromosome is present in males, who have one X and one Y chromosome, while females have two X chromosomes. Identifying genes on each chromosome is an active area of genetic research.
Detailed explanation-2: -Typically, biologically male individuals have one X and one Y chromosome (XY) while those who are biologically female have two X chromosomes.
Detailed explanation-3: -There are 2 types of chromosome, called the sex chromosomes, that determine the genetic sex of a baby. These are named either X or Y. Usually, a female baby has 2 X chromosomes (XX) and a male has 1 X and 1 Y (XY).
Detailed explanation-4: -Two of the chromosomes (the X and the Y chromosome) determine your sex as male or female when you are born. They are called sex chromosomes: Females have 2 X chromosomes. Males have 1 X and 1 Y chromosome.
Detailed explanation-5: -It is well known that meiosis in mammalian spermatogenesis produces 50% Y-and 50% X-chromosome-bearing sperm, a 1:1 ratio.