Question

Which of the following represents the composition of female destined zygote in human beings?
A) 22+X. B) 44+XY. C) 33+Y. D) 44+XX.

Answer 1

Answer:

ANSWER IS (D)

Explanation:

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Answer 2

The genetic composition of a female zygote for human beings is 44+ XX

• Humans have 46 chromosomes (2n) in each cell, two of which constitute the sex chromosomes that determine the sex of the human.
• Humans show XY type of sex determination in which a combination of XY chromosomes is present in males and XX chromosome is present in females.
• The female egg contains the X chromosome, while half of the male sperms have the X chromosome and the other half have the Y chromosome. (Human gametes, that is, the egg and sperm have 23 chromosomes(n))
• Thus, if the egg is fertilized with a Y chromosome containing sperm, it results in a 44 + XY composition which leads to the formation of a male, while fertilization by a sperm with an X chromosome leads to the formation of 44+XX which results in a female.

Thus, (Option D) 44 + XX represents the composition of the female destined zygote in human beings.