Question detail
Which statement best describes the sex chromosome composition of a male?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reproduction
Question
- A. Males have two X chromosomes.
- B. Males have one X and one Y chromosome.
- C. Males have two Y chromosomes.
- D. Males have no sex chromosomes.
Answer
The correct option is Males have one X and one Y chromosome.. This answer is correct because it matches the approved learning objective to describe males as having XY sex chromosomes in the subtopic Sex determination.
Explanation
The correct option is Males have one X and one Y chromosome.. Males have one X and one Y chromosome. is correct because it directly supports the approved learning objective to describe males as having XY sex chromosomes. This belongs to the subtopic Sex determination within Reproduction, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Sex determination.
Common mistake
Misidentifying the Y chromosome
Students often state that males have an X chromosome and a Y chromosome, but they incorrectly describe the Y chromosome as a second X or as a chromosome that carries the same genes as the X.
Clarify that males have one X and one Y chromosome, where the Y chromosome is distinct, smaller, and carries only a limited number of genes that determine male development. Emphasise that the presence of the Y chromosome, not a second X, is what makes a cell male.
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