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12 terms

Patterns of Heredity

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Single Allele
traits that are controlled by a single dominant allele or homozygous
Single Allele
EX. height in pea plant is controlled by a dominant tall allele or two recessive short alleles
Multiple Alleles
traits controlled by more than 2 allels from the same gene
Multiple Alleles
EX. there are three allels for blood type which result in four blood types
Incomplete Dominance
traits have a heterozygous genotype that is intermediate between the dominant and recessive allele
Incomplete Dominance
EX. Some varities of flowering plants will produce a pink flowering version when a homozygous white are crossed
Codominant
traits which have a heterozygous genotype where both alleles have equal expression
Codominant
EX. a chicken that is homozygous black is crossed with a chicken that is homozygous white. Each offspring is black and white
Sex-Linked
traits that appear on the 23rd pair of chromosomes & are normally tfound on the "X" chromosome
Sex-Linked
Colorblindness and hemophilia
Polygenic
traits controlled by 2 or more genes
Polygenic
EX. skin color is controlled by 4-7 genes