Recall that in biology you learned about Chargaff's rule which states that the % of Adenine in a DNA strand should always equal the % of Thymine, and the % of Cytosine should always equal the % of Guanine.
Adenine pairs with Thymine
Guanine pairs with Cytosine
Match the key terms to their
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
exon | arrow_right_alt | the basic unit (monomer) of DNA consisting of a 5-carbon sugar, phosphate group, and nitrogenous base |
Combined DNA Index System (CODIS) | arrow_right_alt | a method used during investigation to duplicate tiny amounts of DNA left at a crime scene |
intron | arrow_right_alt | the FBI's computerized criminal DNA databases including the software used to run these databases launched in 1998 |
polymerase chain reaction (PCR) | arrow_right_alt | the genetic material of all living things |
deoxyribose nucleic acid (DNA) | arrow_right_alt | the portion of DNA that is expressed |
nucleotide | arrow_right_alt | noncoding sequences of DNA that regulate protein production |
What is the sex of this individual?
Which suspect is most likely connected to the murderous knife found at the crime scene?

Describe what a short tandem repeat (STR) is in 1-2 sentences.