| A | B |
|---|
| Thomas Morgan | studied fruit flies |
| chromosome | made of only protein and DNA |
| virus | can inject DNA into cells |
| Watson and Crick | discovered the structure of dna |
| double helix | DNA's shape |
| adenine | pairs with thymine |
| guanine | pairs with cytosine |
| cytosine | pairs with guanine |
| thymine | pairs with adenine |
| sugar | side of DNA ladder that connects to bases |
| phosphate | side of DNA ladder that doesn't connect to bases |
| S phase | period in which DNA replicates |
| ligase | unzips DNA ladder in replication |
| mutation | a change in a strand of DNA |
| mutagens | environmental factors that can influence mutation rates |
| transcription | mRNA codes from DNA template |
| mRNA cap | made of modified guanine nucleotides |
| mRNA tail | made of 100-200 adenines |
| AUG | a start codon |
| UAG,UGA,UAA | stop codons |
