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Saturday, 4 August 2012

The advantages and disadvantages of sexual and asexual reproduction


The advantages and disadvantages of sexual and asexual reproduction

Sexual reproduction involves the fusion of two gametes. The advantages of sexual reproduction are that the offspring may inherit beneficial qualities from both parents, and that there is greater genetic variation among the offspring. Genetic variation increases the chances of a species’ survival as some individual organisms will be better adapted to changes in the environment. The disadvantages of sexual reproduction is that two parents are required, so it will be disadvantageous in a very competitive environment.

Asexual reproduction, on the other hand, does not involve gametes as the offspring arise from the parent through cell division. Thus the advantages of asexual reproduction are that only one parent is required, and that beneficial qualities are more likely to be passed on to the offspring since all offspring are genetically identical to the parent. However, the disadvantage of having genetically identical offspring is that there is less variation, so the organism will be less adapted to changes in the environment.

  • Reproduction is the production of new organisms. Reproduction is necessary to ensure the continuity of species.
  • Asexual reproduction produces genetically identical offspring from one parent by mitosis. Genetically identical offspring are called clones.
  • Sexual reproduction involves the fusion of two gametes to form a zygote, producing genetically dissimilar offspring from two parents. Gametes are special reproductive cells produced by meiosis
  • The process by which the nucleus of the male gamete fuses with the nucleus of the female gamete to form a zygote is called fertilisation. 

12 comments:

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  2. Thank you so much! This is perfect info to help with homework. You are great.

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  3. Thank you so much for making this blog!! I found it so useful whilst doing my GCSEs last year! :)

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    1. Hi Louisa, thank you for your nice comment and you're very welcome! I'm glad it helped!! Hope you got the grades you wanted. :)

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  4. Hey thank you for your blog, it's amazing and the best learning resource i have came across. i think i owe you more than i owe to anyone.THANK YOU once more time.

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Note: This blog will no longer be updated as I finished IGCSEs in 2012. Sorry! :( If you are interested in buying IB notes though, please contact me. :)