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Biology Chapter 9.2

Biology Chapter 9.2 Terms and Definitions

TermDefinition
genotype The entire genetic makeup of an organism also the combination of genes for one or more specific traits
phenotype an organism's appearance or other detectable characteristic that results from the organism's genotype and the environment
homozygous describes an individual that has identical alleles for a trait on both homologous chromosomes
heterozygous describes an individual that has two different alleles for a trait
probability
monohybrid cross a cross between individuals that have different alleles for the same gene
Punnett square a graphic used to predict the results of a genetic cross
genotypic ratio the ratio of the genotypes that appear in offspring
phenotypic ratio the ratio of phenotypes produced by a cross
testcross the crossing of an individual of unknown genotype with a homozygous recessive individual to determine the unknown genotype
complete dominance a relationship in which one allele is completely dominant over another
incomplete dominance
codominance a condition in which both alleles for a gene are fully expressed
dihybrid cross a cross between individuals that have different alleles for the same gene
Created by: conoverc20
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