Half of the possible offspring have the same allele combination; AA homozygous dominant and the other half have the Aa heterozygous combination. Probability close probabilityThe extent to which ...

Where Aa = female genotype close genotypeThe alleles that an organism has for a particular characteristic, usually written as letters. Probability close probabilityThe extent to which something is ...

Genetic diversity is being lost across many species – especially birds and mammals. But you can help stop the decline.

It is this carefully controlled pattern of what is called "gene expression" that makes a liver cell different from a muscle cell, and a healthy cell different from a cancer cell. But how can ...

Finally, the chances that their child will have two copies of the gene, and therefore sickle cell anemia, is also 25 percent. This situation is a stark example of genetic compromise, or an ...

The founder effect is an extreme example of "genetic drift." Genes occurring at a certain frequency in the larger population will occur at a different frequency -- more or less often -- in a ...