Lethal Genes

An example is the "creeper" allele in chickens, which causes the legs to be short and stunted.


Manx Cats

Cats possess a gene for producing a tail. The tailles Manx phenotype in cats is produced by an allele that is lethal in its homozygous state. The allele interferes with normal spinal development, in heterozygous cats this results in lack of a tail.

Show the cross between a manx cat and a normal cat.