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Genetics Vocabulary
Glossary of terms that you must know.
Term | Definition |
---|---|
Genotype | The genetic make up of an organism |
Phenotype | An organism's physical appearance i.e how it looks externally. |
Homozygous | Having the same allele types example an organism is tall because it carries two alleles of the same type (TT) |
Heterozygous | Oraganism having two different allele type for a trait example (Tt) |
Codominance | The alleles are neither dominant or recessive and sometimes referred to as incomplete dominance. |
Hybrid | An organism that results from the breeding of two genetically different individuals example a mule. |
Genetics | the scientific study of heredity |
Heredity | The passing of characterics from parents to offspring. |
Traits | The characteristics that are passed from parents to offspring example eye color. |
Purebred | An offspring that has many generations of the same traits example Yorkshire terrier. |
Genes | The factors that control traits |
Alleles | The different forms of genes example TT or Tt for tallness,. |
Dominant allele | The allele whose trait always shows up if the allele is present. |
Recessive allele | The allele that is hidden whenever a dominant allele is present. |
Punnett Square | The square used in genetics to calculate the frequencies of different phenotypes and genotypes. |
Chromosomes | The threadlike structure in a cell that carries hereditary information (DNA) |
Chromosome Theory | This theory states that the genes are carried from parents to offspring on cheromosomes |
DNA | DeoxyribonucleicAcid |