homozygous dominant

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• Dominant white — This dominant white Thoroughbred stallion (W2/+) has one form of dominant white. His skin, hooves, and coat lack pigment cells, giving him a pink skinned white coat. Dominant white is a group of genetically related coat color conditions in the… …   Wikipedia

• Dominant weißes Pferd — Dominant weißes englisches Vollblut Ein Dominant weißes Pferd erhält seine vollständig weiße Farbe durch Leuzismus, das heißt, die Melanozyten, die Zellen, die die Farbstoffe produzieren, sind aufgrund einer Mutation nicht in der Haut angekommen …   Deutsch Wikipedia

• dominant allele — an allele that is phenotypically expressed when present either in the homozygous or heterozygous state. Cf. recessive a …   Medical dictionary

• Maternal effect dominant embryonic arrest — (Medea) is a selfish gene composed of a toxin and an antidote. A mother carrying Medea will express the toxin in her germline, killing her progeny. If the children also carry Medea, they produce copies of the antidote, saving their lives.… …   Wikipedia

• Dominance (genetics) — For other uses, see Dominance. A pedigree chart shows how genes are inherited. Dominance in genetics is a relationship between two variant forms (alleles) of a single gene, in which one allele masks the effect of the other in influencing some… …   Wikipedia

• Labrador Retriever coat colour genetics — The genetic basis of coat colour in the Labrador Retriever (a highly popular type of dog) has been widely studied, and found to depend on many genes. A wide range of colourings have developed over time.This article examines the current knowledge… …   Wikipedia

• Roan (color) — Roan is a coat color found in many animals, notably horses, cattle and dogs. It is defined generally as an even mixture of white and pigmented hairs that does not gray out or fade as the animal ages. roan , a . and n.1 Oxford English Dictionary.… …   Wikipedia

• Zygosity — refers to the genetic condition of a zygote. In genetics, zygosity describes the similarity or dissimilarity of DNA between homologous chromosomes at a specific allelic position or gene. The terms homozygous, heterozygous and hemizygous are used… …   Wikipedia

• Naked Neck — A Naked Neck rooster, with actual domestic turkeys in the background. Conservation status Study Other names Transylvania Na …   Wikipedia

• Genotype — For a non technical introduction to the topic, see Introduction to genetics. Here the relation between genotype and phenotype is illustrated, using a Punnett square, for the character of petal colour in pea. The letters B and b represent genes… …   Wikipedia

• Test cross — In genetics, a test cross, first introduced by Mendel, is used to determine if an individual exhibiting a dominant trait is homozygous or heterozygous for that trait.Test crosses involve breeding the individual in question with another individual …   Wikipedia