Which sex chromosomes are normally found in a human female?
Answer and explanation
Correct answer: Two X chromosomes
The governing concept is the human chromosomal basis of sex. A typical human female has two X sex chromosomes, written as XX, while a typical male has one X and one Y, written as XY. The ovum therefore carries an X chromosome. An XY combination is not the usual female arrangement, YY is not a viable normal human combination, and every human normally possesses sex chromosomes. Hence option A is correct.
Frequently asked questions
What is the correct answer to this question?
Two X chromosomes
Why is this the correct answer?
The governing concept is the human chromosomal basis of sex. A typical human female has two X sex chromosomes, written as XX, while a typical male has one X and one Y, written as XY. The ovum therefore carries an X chromosome. An XY combination is not the usual female arrangement, YY is not a viable normal human combination, and every human normally possesses sex chromosomes. Hence option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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