THE MOLECULAR BASIS OF INHERITANCE
THE HUMAN GENOME
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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one X chromosomes only
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two X chromosomes
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one X and one Y chromosome
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two Y chromosomes
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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: -They are called sex chromosomes: Females have 2 X chromosomes. Males have 1 X and 1 Y chromosome.
Detailed explanation-4: -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.
Detailed explanation-5: -Boys typically have one X chromosome and one Y chromosome, or XY, but boys with XYY syndrome have an extra Y chromosome, or XYY. XYY syndrome is not caused by anything the parents did or did not do. The disorder is a random error in cell division.