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Genetics
The blueprint of Life is in our genes
Term | Definition |
---|---|
Genotype | The genetic make up of an organism |
Phenotype | The physical appearance of an organism |
Homozygous | An organism that has two of the same alleles for a trait eg. TT or tt |
Heterozygous | An organism that has two different alleles for a trait eg. Tt |
Codominance | The alleles are neither dominant or recessive so a mix of both the traits are expressed. This is also called incomplete dominance. |
Hybrid | An organism that results from breeding of two genetically different organism example a cross between a horse and a donkey producing a mule. |
Genetics | The scientific study of heredity |
Heredity | The passing of characteristics from parent to offspring |
Traits | The characteristics that are passed from parents to offspring |
Purebred | An offspring that has many generation of the same traits. |
Genes | The factors that control the traits |
Alleles | Different forms of the genes example tallness gene is either TT or Tt |
Dominant allele | Allele whose trait always shows up. |
Recessive allele | The allele that is hidden whenever a dominant allele is present |
Punnet square | A square used in genetics used for calculating gene frequencies |
Chromosome | The thread like structure in the cell that carries hereditary information |
DNA | A molecule that stores genetic information |