Science 1
DNA
deoxyribonucleic Acid
Gene
A segment of DNA on a chromosome that codes for a specific trait
"A" Bonds with?
"T"
"C" Bonds with?
"G"
Interphase
Period of the cell cycle when DNA is replicated (copied) and packed into chromosomes
humans have 46, found in the nucleus, compacted DNA
Centromere
place on a chromosome where the two sister chromatids attach
Nucleotide
DNA building block: phosphate, sugar, and a base
double helix
Shade of a DNA
Diploid cells
contain 46 chromosomes - body cells
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Mitosis results in?
Mitosis results in
two identical daughter cells
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Base Pairs or DNA
Adenine, Thymine, Guanine, Cytosine.
A,T,G,C
complimentary base pairing
One side of the double helix would have A, A, C, G, T, so that other side would have T, T, G, C, A
Chromotid
1 of 2 identical "sister" parts of a duplicated chromosome
Meiosis results in
four haploid daughter cells that are not identical
Watson and Crick
Developed the double helix model of DNA
Photo 51
The picture of the structure of DNA taken by Rosalind Franklin
Haploid cells
contain 23 chromosome - reproductive cells
Crossing Over
Process in which homologous chromosomes exchange portions of their chromatids during meiosis 1.
sugar-phosphate backbone
the outside the double helix - holds the base pairs in place
Rosiland Franklin
Took a picture of DNA using crystallography & found out that it was a double stranded helix
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Autosomal cells are
body cells - have 46 chromosomes