A couple has 10 children, all female. Which of the following best explains the s...
QuestionA couple has 10 children, all female. Which of the following best explains the situation
Related Lesson: Sex Determination | The Reproductive System
The correct answer is A.
The question is asking us to choose the best explanation for a couple who has 10 female children. The options are A, B, C, and D.
Option A states that the sex determination was by the man's X chromosome, and this is the correct answer. In humans, sex is determined by the combination of sex chromosomes received from both parents. Females have two X chromosomes, while males have one X and one Y chromosome. If the father's sperm carries an X chromosome, then the child will be female.
Option B states that the man's sperm count is low, but this has nothing to do with the sex of the children. Sperm count only affects the likelihood of conception.
Option C states that the woman is not capable of producing male children, but this is not biologically possible. The sex of the child is determined by the father's sperm.
Option D states that the sex determination was by the man's Y chromosome, but this is incorrect. As mentioned earlier, if the father's sperm carries an X chromosome, then the child will be female.
In summary, the correct answer is A, which explains that the sex determination was by the man's X chromosome. This means that the father's sperm carried an X chromosome, resulting in the birth of 10 female children.
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i think it should be D because the Y chromosome found in males determine the sex of a child.