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I/GCSE Biology: Different types of reproduction

Different types of reproduction

· biology,IGCSE,IGCSE Biology,Reproduction,igcse biology

Do you guys still remember different types of reproduction in I/GCSE Biology?

Sexual reproduction

  • Variation = result of sexual reproduction
  • When gametes formed – receive half of chromosomes in body cell = half from mum + dad
  • Refer to I/GCSE Biology,  Producing gametes = unlikely 2 gametes contain same variation in genes
  • Unlikely 2 offspring from parents are alike – unless twins (because of variation in genes in each gamete and mixing of genes from mum and dad)
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Asexual reproduction

  • Offspring produced by asexual reproduction
  • Produced from division of cells in one parent with no need of fertilisation by sperm cell
  • When it comes to I/GCSE Biology, Offspring are clones (genetically identical) + contain same chromosomes as parent
  • Happens more quickly than sexual reproduction
  • Some plants produce underground stems (runners) – spread quickly to outcompete others in area
  • Runner – horizontal stems that some plants produce in order to create new plants by asexual reproduction
  • Too hot or too cold areas - form underground storage organs, form a new plant next season
  • Storage organs – a special underground organ, such as a potato, in which plants store food over winter
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Applications of asexual reproduction

  • Artificial clones of plant made copying asexual processes
  • Cuttings can be taken – parts of plant cut off (stem or leaf), cuttings grow roots + develop into new plant
  • More quicker than sexual reproduction
  • More cheaper because quicker

That's all~

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