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Ch. 12.2 - When Heredity Follows Different Rules
When Heredity Follows Different Rules
7
Biology
10th Grade
03/22/2011

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Term
Incomplete dominance
Definition
Inheritance pattern where the phenotype of a heterozygote is intermediate between those of the two homozygote; neither allele of the pair is dominant but combine and display a new trait
Term
Codominante alleles
Definition
pattern where the phenotypes of both homozygote parents are produced in heterozygous offspring so that both alleles are equally expressed
Term
Multiple alleles
Definition
presence of more than two alleles for a genetic trait
Term
Autosome
Definition
pairs of matching homologous chromosomes in somatic cells
Term
Sex chromosome
Definition
in humans, the twenty-third pair of chromosomes: determine the sex of an individual and carry sex-linked characteristics
Term
Sex-linked trait
Definition
traits controlled by genes located on the sex chromosomes
Term
Polygenic inheritance
Definition
inheritance pattern of a trait controlled by two or more genes; genes may be on the same or different chromosomes
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