大象传媒

Reproduction, the genome and gene expression - AQA Evaluating sexual and asexual reproduction

Reproduction occurs in all organisms. DNA is important, as it allows new proteins to be synthesised. Mutations in the DNA can have serious implications.

Part of Biology (Single Science)Inheritance, variation and evolution

Advantages and disadvantages of sexual and asexual reproduction

The advantages of sexual reproduction:

  • Produces variation in the offspring
  • The can adapt to new environments due to variation, which gives them a survival advantage
  • A is less likely to affect all the individuals in a population
  • Humans can speed up natural selection through selective breeding, which can increase food production
Picture of five breeds of dogs
Image caption,
Five very different breeds of dog

Sexual reproduction - conception

The advantages of asexual reproduction include:

  • the population can increase rapidly when the conditions are favourable
  • only one parent is needed
  • it is more time and energy efficient as you don't need a mate
  • it is faster than sexual reproduction
Two bulbs. First shows flower bud and small lateral bulb. Second shows same bulb at later date. Remains of leaves at top of flower bud and a larger lateral bulb from which the new plant will grow.
Figure caption,
Daffodil bulb at the start and end of spring

The disadvantages of sexual reproduction:

  • time and energy are needed to find a mate
  • it is not possible for an isolated individual

The disadvantages of asexual reproduction include:

  • it does not lead to variation in a population
  • the species may only be suited to one habitat
  • disease may affect all the individuals in a population