Reproduction

• Sexual reproduction is where genetic material from two organisms combine DNA to create genetically different offspring.
• in sexual reproduction produce the gametes during meiosis
• in each gamete there are 23 chromosomes half the usual 46 in one cell
• Asexual reproduction requires one parent that creates genetically identical offspring
• Asexual reproduction happens by Mitosis
• The new cell is a clone of the original one
• Advantages of Sexual Reproduction:

  • A better chance of surviving a change in environment
  • they become better adapted and can breed and pass on genes. this is known as natural selection.
  • selective breeding can be used to speed up natural selection therefore producing more food.
• Advantages of Asexual reproduction:

  • Only requires one parent
  • requires less time because no mate is needed
  • faster
  • identical offspring can be produced in favourable conditions
• Malaria is caused by mosquitos. the parasite produces sexually when it's in the mosquito but asexually when it's in the human host
• fungi releases spores which become new fungi when they land in the right environment.
• seeds are produced sexually and asexually. strawberries produce 'runners' which are identical new strawberry plants