10-Cellular Division-STUDENTVERSION-2

Often contain two copies of each chromosome

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Unformatted text preview: hromosome – Eukaryotes • linear chromosomes _______________ • Cells often contain two copies of each chromosome (homologous chromosomes) 3 1/3/2013 What is DNA nucleotides • Composed of subunits called_____________ • 3 components – ________________ – ________________ – ________________ • Double helix – – – Strands are complementary a __ pairs with __ t c __ pairs with g __ Chromosomes chromatin • Composed of ________ – DNA + proteins (histones) • 2 forms of chromatin Heterochromatin – _____________ – • Highly condensed • Rarely expressed Euchromatin _____________ - information expressed in that segment will not be able to be expressed • Condensed during division • Expressed (actively transcribed) - contains genetic information 4 1/3/2013 telomere • Chromosome structure Centromere – __________: condensed region of chromosome Telomere – __________: region of repetitive DNA sequences at end of chromosome - highly repetitive; doesn't code for anything; protects DNA from damage; not a big deal if you lose a bit but if you lose too much then it will begin to lose from an area that ac...
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This note was uploaded on 01/14/2014 for the course BIO 1113 taught by Professor Rothacker during the Winter '12 term at Ohio State.

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