Question 1 Medium
How many gametes does one cell make by meiosis?
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Answer: 4
- The cell divides twice.
- It makes four gametes.
Sexual and asexual reproduction and meiosis: GCSE Combined Science Biology practice questions
A second set of questions on sexual and asexual reproduction and meiosis. They are different from the ones on the topic page. Try each, then open the answer and compare your working.
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Question 2 Medium
Where in the human body does meiosis occur? Give one.
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Answer: testes
- Gametes are made in reproductive organs.
- Meiosis occurs in the testes and ovaries.
Question 3 Medium
A body cell has 30 chromosomes. How many are in a gamete?
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Answer: 15
- A gamete has half the number.
- 30 ÷ 2 = 15.
Question 4 Medium
Name one way a plant can reproduce asexually.
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Answer: runners
- Some plants make new plants without seeds.
- One example is runners.
Question 5 Hard
Gametes with 8 chromosomes fuse. How many chromosomes does the zygote have?
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Answer: 16
- 8 + 8 = 16.
- The zygote has 16.
Question 6 Hard
Give one advantage of asexual reproduction.
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Answer: it is faster
- No mate is needed.
- It is faster.
Question 7 Hard
Give one advantage of sexual reproduction.
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Answer: variation
- Offspring differ from each other.
- There is variation.
Question 8 Hard
In which host does the malarial protist reproduce sexually?
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Answer: mosquito
- It reproduces asexually in humans.
- It reproduces sexually in the mosquito.
Question 9 Medium
How many cells does one cell make when it divides by meiosis?
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Answer: 4
- Meiosis involves two divisions.
- So four cells are made.
Quick checks
Short questions with options. Choose one before you open the answer.
Check 1
What is sexual reproduction?
Show answer
The joining of male and female gametes, producing varied offspring.
Check 2
What is asexual reproduction?
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Reproduction with one parent and no gametes, giving clones.
Check 3
What are the human gametes called?
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Sperm and egg cells.
Check 4
What type of cell division makes gametes?
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Meiosis.
Check 5
Where does meiosis happen in humans?
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In the ovaries and testes.
Check 6
How many cells does meiosis make from one cell?
Show answer
Four.
Check 7
How many chromosomes are in a human gamete?
Show answer
23.
Check 8
Why are gametes genetically different from each other?
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The chromosomes are shuffled and shared out randomly.
Check 9
What is fertilisation?
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The fusion of the nuclei of a sperm and an egg cell.
Check 10
What is a zygote?
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The cell formed when two gametes join.
Check 11
What happens to a zygote after fertilisation?
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It divides by mitosis to form an embryo.
Check 12
Give two advantages of sexual reproduction.
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It gives variation, and the species can adapt to a changing environment.
Check 13
Give two advantages of asexual reproduction.
Show answer
It is faster and needs only one parent.
Check 14
How does the malarial protist reproduce?
Show answer
Asexually in the human host and sexually in the mosquito.
Check 15
Give two examples of asexual reproduction in plants.
Show answer
Strawberry runners and daffodil bulbs.
Check 16
What does mitosis do to the chromosome number?
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Keeps it the same.
Check 17
What is a chromosome?
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A thread-like structure in the nucleus that carries genes.
Check 18
What is mitosis?
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Cell division that makes genetically identical cells.
Check 19
What is a clone?
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An offspring with genes identical to its parent.
Check 20
What is a gamete?
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A sex cell, such as a sperm or an egg.
Check 21
How many chromosomes are in a human body cell?
Show answer
46.
Check 22
Why is asexual reproduction a risk if a new disease appears?
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All offspring are identical, so all may be harmed.
Check 23
How do many fungi reproduce asexually?
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By making spores.
Check 24
What does it mean when embryo cells differentiate?
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They become specialised to form different tissues.
Check 25
Which type of reproduction needs a mate?
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Sexual reproduction.
Check 26
What happens to the chromosome number at fertilisation?
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It doubles, restoring the full number.
Check 27
How many cells does meiosis make, and how many chromosomes do they have?
Show answer
Four cells, each haploid, with half the number of chromosomes.
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