Which chromosome combination forms a female child in humans?
Answer and explanation
Correct answer: XX
The governing concept is chromosomal sex determination in humans. The mother’s egg contributes an X chromosome, and the father’s sperm contributes either X or Y. If an X-bearing sperm fertilises the X-bearing egg, the resulting zygote has the XX combination, which is the usual chromosomal pattern associated with female development. Thus A is correct. XY is the usual male combination, and YY or a single Y cannot produce the required zygote.
Frequently asked questions
What is the correct answer to this question?
XX
Why is this the correct answer?
The governing concept is chromosomal sex determination in humans. The mother’s egg contributes an X chromosome, and the father’s sperm contributes either X or Y. If an X-bearing sperm fertilises the X-bearing egg, the resulting zygote has the XX combination, which is the usual chromosomal pattern associated with female development. Thus A is correct. XY is the usual male combination, and YY or a single Y cannot produce the required zygote.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
