Flashcards in Genetics Deck (6)
How are genetics determined?
at fertilisation, when sperm and egg fuse to form a zygote. 23 pairs of chromosomes inc sex chromosomes
Define: gene mutation
DNA in a cell is damaged or changed, which permanently alters the cell’s genetic information.
Define: genetic predisposition to disease
When genes don't directly cause a condition but make them more likely to develop it
Can lead to?
• Gender differences in conditions
o Males more likely to have haemophilia (blood doesn’t clot, and X-linked recessive)
o Women can’t get prostate/testicular cancer
o Men can’t get ovarian cancer, and are less likely to get breast cancer due to smaller breasts
• Gene mutations can lead to genetic conditions (eg. Downs Syndrome)