| A | B |
|---|
| DNA | code of life; basic thing of heredity |
| nitrogen bases | steps of twisted ladder are formed by ___ ___. |
| Adenine (A) | one of the 4 nitrogen bases; A + T, G + C |
| Thymine (T) | one of the 4 nitrogen bases; A + T, G + C |
| Guanine (G) | one of the 4 nitrogen bases; A + T, G + C |
| Cytosine (C) | one of the 4 nitrogen bases; A + T, G + C |
| mitosis | copy and devision of the nucleus and chromosomes during cell reporduction |
| replication | copy |
| homozygous | an organism that has the same gene; purebred. Eg. BB or bb |
| heterozygous | an organism that has both a recessive and dominant gene; hybrid. Eg. Bb |
| organism | living thing |
| allele | each member of a gene pair; eg. T in Tt |
