A farmer wants to produce a large number of offspring from a prize-winning cow. Explain why the farmer would choose asexual reproduction rather than sexual reproduction to achieve this aim.

AQA GCSE Biology (8461) — 4.6.1 Reproduction · Explain · 4 marks · View as Markdown

Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).

Model answer (4 marks)

Asexual reproduction involves only one parent, so no male gamete is required.
Asexual reproduction produces genetically identical offspring, so each calf has the same DNA as the prize‑winning cow.
Because the offspring are clones, the desirable traits of the cow are preserved and passed on to all of them.
In contrast, sexual reproduction creates genetic variation, meaning some calves may not inherit the prize‑winning characteristics, which asexual reproduction avoids.

Examiner tips

  • Use the exact phrases from the mark scheme – e.g. ‘genetically identical offspring’ and ‘preserved / passed on’. Show the logical sequence: one parent → no male gamete → identical DNA → traits preserved. Keep the answer concise – 4 short sentences matching the 4 marks.

Common mistakes

  • Mixing up asexual and sexual reproduction terms (e.g. saying asexual needs a male gamete). Failing to mention that asexual reproduction avoids genetic variation. Writing too many words or extra explanation that distracts from the key points.

Mark scheme (4 marks)

  1. Asexual reproduction involves only one parent / no male gamete is needed
  2. Asexual reproduction produces genetically identical offspring (to the parent)
  3. So the desirable / prize-winning characteristics of the cow are preserved / passed on to all offspring
  4. Sexual reproduction creates genetic variation (so offspring may not have the desirable characteristics) / asexual reproduction avoids this risk

Key terms in this question

asexual reproduction · sexual reproduction

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