CH2-1 - BIOL 2153 Aaron P. Smith Genetics: From Genes to...

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Genetics: From Genes to Genomes 3 rd Edition Hartwell ● Hood ● Goldberg ● Reynolds ● Silver ● Veres BIOL 2153 Aaron P. Smith
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Four bases – G (guanine), A (adenine), T (thymine), and C (cytosine) are the nucleotide building blocks of DNA DNA DNA is a double stranded helix composed of A-T and G-C complementary bases
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3 Genes are sequences of DNA that encode proteins GENE : DNA region that encodes proteins EXON : coding region of DNA INTRON : non-coding region of DNA
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Packaging of DNA
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5 DNA resides in within cells packaged as units called chromosomes The entire collection of chromosomes in each cell of an organism is called a genome Humans have 24 chromosomes…
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Humans have 24 chromosomes. 1. True 2. False
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7 Chromosome pairs 1-22 are the AUTOSOMES C h r o m s e p a i 2 3 n t S E X H R O M
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8 All living things are closely related RNA was probably the first information-processing molecule, but RNA is unstable RNA is composed of four bases: guanine (G), adenine (A), cytosine (C), and uracil (U)
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9 All living organisms use the same codes for RNA, DNA, and protein
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This note was uploaded on 11/27/2011 for the course BIOL 12 taught by Professor Kim during the Spring '10 term at LSU.

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CH2-1 - BIOL 2153 Aaron P. Smith Genetics: From Genes to...

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