SB3h Inheritance Flashcards
1
Q
Family pedigree chart
A
A chart showing the phenotypes and sexes of several generations of the same family, to track how characteristics have been inherited.
2
Q
Probability
A
The likelihood of an event happening. Can be shown as a fraction from 0 to 1, a decimal from 0 to 1 or as a percentage from 0% to 100%.
3
Q
Punnet square
A
Diagram used to predict the different characteristics in the offspring of two organisms with known combinations of alleles. You can use the square to work out the probability (how likely it is) that offspring will inherit a certain feature.
4
Q
Sex chromosome
A
Chromosome that determines the sex of an organism. In humans, males have one X sex chromosome and one Y sex chromosome, while females have two Xs.
