Lethal alleles (also referred to as lethal or lethals) are alleles that cause the death of the organism that carries them. They are usually a result of...

carries a different lethal allele, which is compensated for by the functioning allele on the other chromosome. Since both these lethal alleles end up in the...

(EDNRB) gene causes lethal white syndrome when homozygous. Carriers, which are heterozygous—that is, have one copy of the mutated allele, but themselves are...

years ago. Numerous hypotheses have been advanced as to why such a lethal allele has persisted and spread in the human population. Other common autosomal...

behaviour of recessive lethal alleles:; when short-legged birds are bred, 25% of the embryos are homozygous for the lethal allele, and die in shell; 50%...

interact (see Mendelian inheritance). This can include lethal effects and epistasis (where one allele masks another, regardless of dominant or recessive status)...

mutation. Null alleles can have lethal effects depending on the importance of the mutated gene. For example, mice homozygous for a null allele for insulin...

natural selection against deleterious alleles prompted by inbreeding. Purging occurs because deleterious alleles tend to be recessive, which means that...

cuniculus), lethal dwarfism occurs in individuals homozygous for the dwarf allele (dwdw). Homozygosity for the dwarf allele results in a lethal autosomal...

from Chile. It was bred to retain the blue-egg gene but eliminate the lethal alleles of the parent breed. There are both standard-sized and bantam versions...