Flashcards
Genetic Variation
Cards in this deck (10)
- 1What are gametes?Egg and Sperm cells
- 2Where are gametes formed?Eggs formed in the ovaries and Sperm in the testes
- 3What happens in gamete formation?23 pair of chromosomes are lined up they split up to form gametes with half the number of chromosomes (23) Each gamete has some of both mum and dads genes allowing genetic variation
- 4Three sources of genetic variation?Gamete formulation
Fertilisation
Mutations - 5What is fertilisation?When the sperm and egg join to form a new cell the gametes that are chosen are completely random
- 6How does mutation cause genetic variation?Causes the gene to mutate causing a change and a new characteristics form increasing variation
- 7What factors in the environment affect your characteristicsHealth
Intelligence
Sporting ability - 8How does health affect characterstics?Some people get certain diseases such as cancer or heart disease due to personal choices such as smoking or eating junk food etc
- 9How does intelligence affect characteristics?Genes have some affects however your upbringing and school life have an affect on characteristics
- 10How does sporting ability affect characteristics?Genes determine potential however training has a massive effect to reach potential
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- GCSE Higher Biology (B1) Flashcards on Genetic Variation, created by esther.babatunde on 15/02/2014.
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- esther.babatunde
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