Genetic Cross¶
A genetic cross is a table that can show the probability of alleles passed on to children.
Example¶
For examples, lets use the eye colour allele. B is a dominant allele and codes for brown eyes. b is a recessive allele and codes for blue eyes. In the example, both parents have brown eyes, but they both carry the allele for blue eyes.
| B | b | |
|---|---|---|
| B | BB | Bb |
| b | Bb | bb |
From the genetic cross, you can establish there is a 75% chance the child will have brown eyes - with a 50% chance they will be a carrier of blue eyes, and a 25% chance they will have blue eyes.
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