August 14, 2011

3.1 Reproduction

3.1 understand the difference between sexual and asexual reproduction
An animal can be either Sexual or Asexual each type has it's own distinct characteristics as listed below


Sexual reproducing creatures

  • They have a sex/gender, so can be identified as either male or female.
  • They produce cells called 'Gametes', the sperm cell in males, and the egg cell in females
  • To produce these Gametes, a type of cell division called Meiosis is used, which is A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell.
  • Fertilisation occurs, where opposite Gametes fuse together
  • There is a broad variation in the individuals (i.e. humans are very different from each other)
Asexual reproducing creatures:

  • There are no Sexes or Genders
  • There are no Gametes
  • Asexual reproduction involves Mitosis or Binary Fission (Note: Mitosis is used in Sexual reproducing creatures, but not for reproduction)
  • No fertilisation because there are no Gametes
  • There is little variation between individuals and this is due to mutations all others are "identical" also known as "clones"

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