Unit 3 Chapter 10 Cell Cycle

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Unit 3 Chapter 10 Cell Cycle

• Section 10.1

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A) Chromosome Structure

• Chromosomes rod-shaped structure that holds DNA
  and proteins
• -histones
• -nonhistone

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A) Chromosome Structure

• Sister Chromatids halves of a chromosomes that
  contain identical info.
• Centromere connecting point of sister chromatids
• Chromatin loosely coiled DNA and histones in
  eukaryotes

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Chromosome Structure
Sister Chromatids
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A) Chromosome Structure

• 5) Prokaryotes
• - 1 chromosome
• - Circular DNA

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B) Chromosome Numbers

• Sex Chromosomes mainly determine sex of
  organism, but do carry other information
• - Female XX
• - Male XY

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B) Chromosome Numbers

• Autosomes Any other chromosome
• All autosomes are in identical pairs
• Homologous pairs two copies of each autosome
• Code for same size, shape, and traits

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B) Chromosome Numbers

• Karyotypes chart of a complete set of
  chromosomes for an organism
• -Humans have 46 chromosomes ? 23 chromosomes
  from each parent

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B) Chromosome Numbers

• Diploid any set of chromosome pairs
• Haploid 1 chromosome, generally sex cells
  (sperm, eggs)