GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
one X chromosome only.
|
|
|
two X chromosomes
|
|
|
one X chromosome 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: -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-3: -Typically, biologically male individuals have one X and one Y chromosome (XY) while those who are biologically female have two X chromosomes.
Detailed explanation-4: -It is well known that meiosis in mammalian spermatogenesis produces 50% Y-and 50% X-chromosome-bearing sperm, a 1:1 ratio.
Detailed explanation-5: -Females have two X chromosomes, while males have one X and one Y chromosome. Early in embryonic development in females, one of the two X chromosomes is randomly and permanently inactivated in cells other than egg cells.