recessive lethal

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• Lethal alleles — Alleles that cause an organism to die are called lethal alleles, where the gene involved is an essential gene. When Mendel s Laws were rediscovered, geneticists believed that mutants would only alter the appearance of a living organism. However,… …   Wikipedia

• Lethal white syndrome — (LWS), also called overo lethal white syndrome (OLWS), lethal white overo (LWO), and overo lethal white foal syndrome (OLWFS), is an autosomal genetic disorder most prevalent in the American Paint Horse. Affected foals are born after the full 11… …   Wikipedia

• lethal gene — n a gene that in some (as homozygous) conditions may prevent development or cause the death of an organism or its germ cells called also lethal factor, lethal mutant, lethal mutation * * * a gene that, under certain conditions, causes the death… …   Medical dictionary

• lethal factor — noun see lethal gene * * * lethal factor or lethal gene, Biology. any gene, either dominant or recessive, which results in the premature death of the organism bearing it …   Useful english dictionary

• lethal gene — a gene that, under certain conditions, causes the death of the individual carrying it. Lethal genes are usually recessive: an individual will die only if both his parents carry the gene. If only one parent is affected, the lethal effects of the… …   The new mediacal dictionary

• lethal multiple pterygium syndrome — a lethal autosomal recessive disorder caused by mutations in any of several genes that encode acetylcholine receptor components, characterized by multiple pterygia, lung hypoplasia, flexion contractures of the limbs, characteristic facies, and… …   Medical dictionary

• balanced lethal system — A system for maintaining a recessive lethal allele at each of two loci on the same pair of chromosomes. In a closed population with no crossing over between the loci, only the double heterozygotes for the lethal mutations survive …   Glossary of Biotechnology

• evolution — evolutional, adj. evolutionally, adv. /ev euh looh sheuhn/ or, esp. Brit., /ee veuh /, n. 1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane. 2. a product of such development; something… …   Universalium

• Mutagen — In genetics, a mutagen (Latin, literally origin of change) is a physical or chemical agent that changes the genetic material, usually DNA, of an organism and thus increases the frequency of mutations above the natural background level. As many… …   Wikipedia

• Meckel syndrome — Classification and external resources ICD 10 Q61.9 OMIM 249000 DiseasesDB …   Wikipedia

• Coat (dog) — For other uses, see Coat (disambiguation). Close up of a greyhound s short haired single coat. The coat of the domestic dog (Canis lupus familiaris) refers to the hair that covers its body. A dog s coat may be a double coat, made up of a soft… …   Wikipedia