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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)
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
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~
