Incomplete Dominance, Codominance, Polygenic Traits, and Epistasis!
Codominance
A condition in which neither of two alleles of a gene is dominant or recessive.
dihybrid cross
A cross between individuals that have different alleles for the same gene
monohybrid cross
A cross between individuals that involves one pair of contrasting traits
Allele
An alternative form of a gene.
Heterozygous
An organism that has two different alleles for a trait
Homozygous
An organism that has two identical alleles for a trait
Genotype
An organism's genetic makeup, or allele combinations.
Phenotype
An organism's physical appearance, or visible traits.
Non-Mendelian Genetics
Inheritance patterns that express incomplete dominance
Non-Mendelian Traits
Traits that do not follow Mendel's patterns of heredity.
polygenic traits
characteristics that are influenced by more than one pair of genes (ie height)
testcross
cross between an organism with an unknown genotype and an organism with a recessive phenotype
dominant gene
member of a gene pair that controls the appearance of a certain trait
incomplete dominance
one allele is not completely dominant over the other allele
locus
position of a gene on a chromosome
Recessive gene
trait of an organism that can be masked by the dominant form of a trait
Epistasis
when one gene depends on another gene for it to be expressed