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Chapter 9 Section 2
ch 9 sec 2
Term | Definition |
---|---|
genotype | an organisms genetic makeup |
phenotype | an organisms appearance |
homozygous | when both alleles of a pair are alike |
heterozygous | when the two alleles in a pair are different |
probability | the likelihood that a specific event will occur |
monohybrid cross | a cross in which only one characteristic is tracked |
punnett square | cross designed to predict the outcome of the inherited traits of the offspring |
genotypic ratio | the ratio of the genotypes |
phenotypic ratio | the ratio of the offspring's phenotypes |
testcross | when an individual of unknown genotype is crossed with a homozygous recessive individual |
complete dominance | one allele is completely dominant over another |
incomplete dominance | offspring will have a phenotype in between that of the parents |
codominance | when both alleles for a gene are expressed in a heterozygous offspring |
dihybrid cross | a cross in which two characteristics are tracked |