Question detail
If a female (XX) is homozygous dominant for a sex‑linked trait and a male (XY) is homozygous recessive, what proportion of male offspring will show the trait?
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. 0%
- B. 25%
- C. 50%
- D. 100%
Answer
The correct option is 0%. This answer is correct because it matches the approved learning objective to carry out a genetic cross to show sex inheritance in the subtopic Sex determination.
Explanation
The correct option is 0%. 0% is correct because it directly supports the approved learning objective to carry out a genetic cross to show sex inheritance. 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
Misunderstanding Genetic Crosses
Students often confuse the process of carrying out a genetic cross with simply stating the sex chromosomes involved, failing to show the actual inheritance pattern.
To fix this, students should practice drawing Punnett squares to illustrate the genetic cross, clearly indicating the parental gametes and the resulting offspring genotypes.
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