Topic Content:
- Genes and Environment
- Probability in Genetics
- Application of the Principles of Genetics
The environment can alter the expression of genes. In fruit flies, the expression of the mutation for vestigial wings (short-shrivelled wings) can be altered by temperature. When raised in a hot environment, fruit flies that are homozygous, recessive for the vestigial wings, can grow wings almost as long as normal wild-type wings.
Probability in Genetics:
Probability is the likelihood that a particular event will happen. It cannot predict whether a particular event will actually occur. However, if the sample is large enough, it can predict an average outcome.
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