ESAT (Engineering and Science Admissions Test) · Biology
Cell division and sex determination
6 practice questions, each with the answer and an explanation.
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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 6 questions
- An organism has chromosomes. Ignoring crossing over, how many genetically different gametes can it produce?
- In a sample of onion root-tip cells, are in mitosis. What is the mitotic index?
- Which statement best explains why mutations in some genes can lead to cancer?
- A body cell of an organism has chromosomes. How many chromosomes are in each daughter cell after mitosis, and in each gamete after meiosis?
- A couple has two children. What is the probability that both are girls?
- Failure of homologous chromosomes to separate in meiosis results in a gamete with an extra chromosome. What is this called, and what total chromosome number does a zygote have if this gamete fertilise…
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