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Biology: Chapter 9.2
Chapter 9.2 Vocabulary
| Term | Definition |
|---|---|
| Genotype | an organism's genetic makeup |
| Phenotype | an organism's appearance |
| Homozygous | when both alleles of a pair are alike |
| Heterozygous | when the two alleles of 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 | a diagram biologists use that aid them in predicting the probable distribution of inherited traits in the offspring |
| Genotypic Ratio | the ratio of the genotypes that appear in offspring |
| Phenotypic Ratio | the ratio of the offspring's phenotypes |
| Testcross | in which an individual of unknown genotype is crossed with a homozygous recessive individual; can determine the genotype of any individual whose phenotype expresses the dominant trait |
| Complete Dominance | when one allele was completely dominant over another |
| Incomplete Dominance | when the offspring have a phenotype in between that of the parents; occurs when the phenotype of a heterozygote is intermediate between the phenotypes determined by the dominant and recessive traits |
| Codominance | occurs when both alleles for a gene are expressed in a heterozygous offspring; neither allele is dominant or recessive, nor do the alleles blend in the phenotype |
| Dihybrid Cross | a cross in which two characteristics are tracked |
Created by:
truongm19
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