DNA is made of Nucleotides (p. 282)

Nitrogen Bases

DNA Fingerprinting I. DNA is collected from usually blood, semen, or hair – Restrictive enzymes cut the DNA at specific sites – The cut up DNA is then placed in an agarose gel in a pan – Electrophoresis Using an electric current to separate DNA Strands Short strands migrate through the gel easier than the long strands do. – Thus, short strands go further through the gel – A DNA fingerprint is made. – Look at the following site to complete the simulated DNA fingerprint: – dnafp2/?utm_source=teachersdomain_redirect/asset/tdc0 2_int_creatednafp2/utm_medium=teachersdomain/asset/ tdc02_int_creatednafp2/utm_campaign=td_redirects dnafp2/?utm_source=teachersdomain_redirect/asset/tdc0 2_int_creatednafp2/utm_medium=teachersdomain/asset/ tdc02_int_creatednafp2/utm_campaign=td_redirects

Purpose of DNA Replication

I. DNA Replication (p. 285) – A. DNA is copied 1. Happens before a cell divides 2. Without DNA replication, new cells would only have half the DNA of the original cell 3. Steps of replication – a. Separation of strands – b. Base Pairing (Free floating nucleotides pair up) 4. Results of replication – a. 2 new molecules of DNA – b. Each new molecule has 1 original strand and 1 new strand

Mitosis A. B. C. D.

Correct Way

Wrong Way