Genetics II Terms
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Created by:
hcps-gainesjm on April 26, 2011
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12 terms
Terms | Definitions |
|---|---|
 heredity | passing on characteristics from parent |
| genetics | study of heredity |
| Traits | Inherited characteristics |
| Genome | All genes in an organism |
| Alleles | Different forms of the same gene, get 2 alleles for each trait (mom & dad) tall/short |
| Homozygous | Two alleles of the same form (2 dominants and 2 recessives) |
| Heterozygous | Different alleles (one dominant and one recessive) |
| Recessive | form of gene only expressed in homozygous state, masked by dominant gene |
| Dominant | Form of a gene that always shows even if recessive allele is present |
| Phenotype | Organism's physical appearance caused by expression of genes |
| Genotype | Type of gene alleles present in organism's genome (Two letters for each trait |
| Test cross | Genotypically homozygous recessive organism crossed with a phenotypically dominant organism, used to determine the genotype of an unknown |
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