Gametes are sperm and egg cells. They are formed in the ovaries or testes. Gametes they only have 23 chromosomes. Each gamete has some from mum and some from dad, leading to variation.
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What is fertilization?
Where gametes join together. The sperm and egg, with 23 chromosomes each, form a new cell with 46. Fertilization is random - you dont know which gametes join together.
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What are mutations?
Occasionally a gene may mutate. It can create new characteristics, increasing variation.
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What are features determined by?
Genes and Environment.
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What do you need to know about inheritance?
Genetic diagrams can show the likelihood of inheriting something. (features and disorders)
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Other cards in this set
Card 2
Front
What do chromosomes usually come in?
Back
Pairs.
Card 3
Front
What are chromosomes made up of?
Back
Card 4
Front
What are genes made up of?
Back
Card 5
Front
What are different versions of the same gene called?
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