AQA · GCSE · Combined Science
Course version: 8464 · Version from Sept 2018
Sexual and asexual reproduction: Asexual reproduction involves only one parent and no fusion of gametes. There is no mixing of genetic information. This leads to genetically identical offspring (clones). Only mitosis is involved.
Asexual reproduction produces offspring from a single parent, so no gametes fuse and no genetic material is exchanged.
- 3 key terms
Study notes
From the checked teaching notes for this specification point.
The idea
Asexual reproduction produces offspring from a single parent, so no gametes fuse and no genetic material is exchanged. Because the parent cell divides by mitosis, each daughter cell receives an exact copy of the parent's chromosomes. The offspring are therefore genetically identical clones of the parent. A familiar example is a strawberry plant sending out runners: each new plantlet is genetically the same as the parent plant. Potato tubers sprouting are another example. This contrasts with sexual reproduction, where two parents contribute gametes and meiosis creates genetic variation. Understanding this distinction lets you explain why asexual populations may struggle if the environment changes, since all individuals share the same alleles.
What earns the marks
- Asexual reproduction involves one parent only, with no fusion of gametes.
- No mixing of genetic information occurs, so offspring are genetically identical clones of the parent.
- Only mitosis is involved, producing genetically identical daughter cells.
- Examples include runners in strawberry plants and tubers in potatoes.
- Because offspring are clones, they share the same alleles and may be equally vulnerable to a change in environment or a new disease.
Common mistakes and how to put them right
Saying asexual reproduction involves two parents but no gametes.
Put it right by stating that only one parent is involved.
Confusing mitosis with meiosis in asexual reproduction.
Put it right by stating that only mitosis occurs, producing identical cells.
Claiming offspring are similar but not identical.
Put it right by stating they are genetically identical clones, except for rare mutations.
Exam tips
- Link each clause of the definition to a named example, such as strawberry runners, to show understanding.
- Use the phrase genetically identical clones rather than just identical, to match the specification wording.
- When comparing with sexual reproduction, mention both variation and the number of parents to gain comparison credit.
Try the lesson
The start of the Sexual and asexual reproduction: Asexual reproduction involves only one parent and no fusion of gametes. There is no mixing of genetic information. This leads to genetically identical offspring (clones). Only mitosis is involved. lesson, made from checked teaching notes for this specification point.
Have a go first
Which type of cell division is involved in asexual reproduction?
Listen
Asexual reproduction produces offspring from a single parent, so no gametes fuse and no genetic material is exchanged. Because the parent cell divides by mitosis, each daughter cell receives an exact copy of the parent's chromosomes. The offspring are therefore genetically identical clones of the parent. A familiar example is a strawberry plant sending out runners: each new plantlet is genetically the same as the parent plant. Potato tubers sprouting are another example. This contrasts with sexual reproduction, where two parents contribute gametes and meiosis creates genetic variation. Understanding this distinction lets you explain why asexual populations may struggle if the environment changes, since all individuals share the same alleles. A strong answer earns marks for these points. Asexual reproduction involves one parent only, with no fusion of gametes. No mixing of genetic information occurs, so offspring are genetically identical clones of the parent. Only mitosis is involved, producing genetically identical daughter cells. Examples include runners in strawberry plants and tubers in potatoes. A common slip: Saying asexual reproduction involves two parents but no gametes. Instead, stating that only one parent is involved. Exam tip: Link each clause of the definition to a named example, such as strawberry runners, to show understanding.
Key words
Say what each word means before you turn the card.
Asexual reproduction
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Clones
Try answering aloud or in your head before turning the card.
Mitosis
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See every definition
- Asexual reproduction
- Involves only one parent and no fusion of gametes, with no mixing of genetic information.
- Clones
- Genetically identical offspring, produced because only mitosis is involved.
- Mitosis
- The only form of cell division involved in asexual reproduction.
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