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Genetics
Monohybrid and Dihybrid Crosses
Term | Definition |
---|---|
Genetics | Study of heredity. |
Heredity | Passing of traits from parents to offspring. |
Trait | A any characteristic that can be passed from parent to offspring. |
Gene | A gene is a segment of DNA that codifies for a protein. |
Allele | Alternative versions of a gene. |
Dominant allele | Determines the trait, even when is heterozygous or homozygous. Is represented by CAPITAL LETTERS. |
Recessive allele | Determines the trait only when both alleles are recessive. Is represented by lowercase letters. |
Genotype | The genetic makeup of an organism. The combination of alleles. |
Phenotype | Physical expression of the genotype. |
Homozygous | An organisms has two identical alleles for a gene. |
Heterozygous | An organism has two different alleles for a gene. |
Monohybrid cross | Inheritance of a single characteristic or gene. |
Dihybrid cross | Inheritance of two independent characteristics or two different genes. |