In example 2, only one parent (the father) has a copy of the recessive allele (Ff). There is no chance of them producing a child with cystic fibrosis. However, half the possible offspring will be ...

Body color in fruit flies is an example of a gene with two alleles: a dominant allele for brown body color, and a recessive allele for black body color. The brown body color allele can be ...

Alleles are different forms of the same gene, for example blue and brown are both ... Dominant alleles will be expressed even if a recessive allele is present. Recessive alleles will be overridden ...

is recessive to the normal red-eye allele (B). If you are given a male with a yellow body and red eyes, how can you determine its genotype? In this example, there are now four possible genotypes ...