reside in nucleus. present in pairs. made of DNA and proteins. Homologs (pairs) separate during meiosis.
A funtional segment of DNA located at a certain point (locus) on a chromosome;codes for a protein.
found in nucleus. carries hereditary information. Consists of 4 nucleotides (contains a 5 carbon deoxyribose sugar, a phosphate and a Nitrogen base) 4 different nitrgoen bases.
worked with protein structure. helped prove that DNA must be the holder of hereditary information.
discovered that base composition of DNA varies from one species to another. But DNA always has equal amounts of Adenine and Thymine and equal amounts of Guanine and Cytosine.
Rosalind Franklin and Maurice Wilkins
Bombarded DNA with x-rays to form a picture. determined that DNA was helical, has repeating subunits, and had a sugar-phosphate backbone.
A possible model of replication. 2 parental strands act as templates for 2 new strands then reassociate. This was determined to be false.
A possible model of replication. 2 parental strands act as templates for 2 new strands. Each replicated helix contains one "old" strand and one "new" strand. This was determined to be true by Messelson and Stall.
A possible model of replication. Daughter strands are composed of old and new DNA pieces.
to replicate "backwards", pieces on the lagging strand are made in the 5 prime to 3 prime direction and those pieces are called...
works ahead of the helicase to relieve tension on the double helix. It does this by cutting the sugar-phosphate backbone, swiveling it and reattaching it.
leading strand only needs one primer from the origin of replication. Lagging strand needs a new primer for each Okazaki Fragment.
proofread the DNA. 130 types identified in humans. 1 in 100,000 are mispaired and then corrected. DNA polymerases also double check base pairing.
humans have this repeated 100-1000 times at the ends to protect the ends of the DNA. carries no genetic information. is just there to protect the ends.