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Reproduction, Genetics and Inheritance

Quick questions on Sexual reproduction in humans explained: O-Level Biology

5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What are gametes?
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Sexual reproduction involves two gametes (sex cells):
What is fertilisation?
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Fertilisation is the fusion (joining) of the nucleus of a male gamete with the nucleus of a female gamete to form a single cell called a zygote. The zygote now has a full set of genetic material, half from each parent. It divides many times to form an embryo, which develops in the uterus into a baby.
What is q1?
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Name the male and female gametes in humans. [2 marks]
What is q2?
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Define fertilisation. [2 marks]
What is q3?
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Explain why sexual reproduction leads to variation in the offspring. [2 marks]

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