Reproduction

• Asexual reproduction involves the production of offspring without the involvement of gametes or the fusion of genetic material.
• Gametes are formed through meiosis
• Gametes produced through meiosis are not the same and each have a different genetic makeup called variation.
• Variation means offspring are more likely to survive if the environment changes.
• selective breeding is the speeding up of natural selection to achieve offspring with desired characteristics
• In bacteria, asexual reproduction is known as binary fission
• A person with two X chromosomes is female
• A person with an XY chromosome is male
• This is a genetic cross diagram

  
• The chance of a parent producing a male or a female is in a 1:1 ratio
• Fertilisation occurs when the nucleus of the sperm cell fuses with the nucleus of the egg
• Mitosis occurs when an embryo is developing into a new individual.
• 4 gametes are formed as a result of meiosis