| A | B |
|---|
| homozygous dominant | two alleles are upper case (RR) |
| heterozygous | one allele is upper case and one allele is lower case (Rr) |
| purebred recessive | same as homozygous recessive (rr) |
| purebred dominant | same as homozygous dominant (RR) |
| hybrid | same as heterozygous (Rr) |
| genetics | study of heredity |
| heredity | the passing of traits from parent to offspring |
| Crick and Watson | discovered the structure of DNA and revolutionized the study of genetics |
| Gregor Mendel | Father of Modern Genetics |
| genotype | two alleles (RR,rr,Rr) |
| Hybrid | Rr |
| DNA | chemical found on alleles that contains instructions for the cell |
| allele | a gene that is represented by a letter |
| dominant allele | this allele will cover up the weaker allele |
| phenotype | the physical characteristic which comes from the genotype. (example - black hair) |
| genotype | two alleles - the genetic make-up for a trait |
| Homozygous Recessive | rr |
| Homozygous Dominant | RR |
