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AgEnt2 genetics3

extending mendelian genetics

Epistasis a gene alters the phenotype at a different locus..coat colour in labradors
incomplete dominance intermediate form of gene expressed
codominance both genes expressed
multiple alleles more than two alleles for a gene
lethan white overo(LWO) two copies of mutated gene in horses
dexters bulldog calves, extreme dwarfism.chondrodysplasia
pleiotropy a gene at 1 locus effects more than 1 characteristic or phenotype for example goats, polled and intersexed. and sickle cell anaemia
in multiple gene conditions each dominant allele has a quantitative effect on phenotype. height and weight for example
dominant if a trait is present in a heterozygote
recessive trait only present in homozygous condition
co dominance more than one allele is fully expressed
Created by: MKHealy