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Cell reproduction
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Cell reproduction

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  • 1. Notes: Life of a CellPart 1: Understanding the Chromosome
  • 2. I. Understanding DNA as a Chromosome 5 Key PointsA. Found in theNUCLEUS of the cell
  • 3. I. Understanding DNA as a Chromosome 5 Key PointsB. Composed of 1 very large, compacted,TIGHTLY COILED strand of DNA1. DNA name: DEOXYRIBOSE NUCLEIC ACID• Contains the HEREDITARY INFORMATION for the assembly of PROTEINS in the body that specifies cell structure and function
  • 4. I. Understanding DNA as a Chromosome 5 Key Points2. Built by repeating subunits or monomerscalled NUCLEOTIDES: 3 partsa. DEOXYRIBOSE SUGARb. PHOSPHATE GROUPc. NITROGEN BASES (A,T,C,G)
  • 5. I. Understanding DNA as a Chromosome 5 Key Points Nitrogen Draw this and label it! DNA Nucleotide
  • 6. I. Understanding DNA as a Chromosome 5 Key Points3. GENE: a segment of DNA coding for aspecific trait
  • 7. I. Understanding DNA as a Chromosome 5 Key PointsC. Chromosome appearancein the cell varies1. LOOSELY coiled: dark mass2. TIGHTLY coiled: extended threadlike strands  Can be seen during stages of cell division
  • 8. I. Understanding DNA as a Chromosome 5 Key PointsD. Chromosome number - Humans Chromosome # in HumansHAPLOID = 23 Chromosomes Diploid = 46 Chromosomes-1/2 set of chromosomes -Full set of chromosomes-Gamete: sex cells -Somatic Cell: body cells-ex: sperm and egg Ex: skin, liver, zygote
  • 9. HAPLOID = 23 Chromosomes-1/2 set of chromosomes-Gamete: sex cells-ex: sperm and egg
  • 10. I. Understanding DNA as a Chromosome 5 Key PointsD. Chromosome number - Humans Chromosome # in HumansHAPLOID = 23 Chromosomes Diploid = 46 Chromosomes-1/2 set of chromosomes -Full set of chromosomes-Gamete: sex cells -Somatic Cell: body cells-ex: sperm and egg Ex: skin, liver, zygote
  • 11. Diploid = 46 Chromosomes-Full set of chromosomes-Somatic Cell: body cellsEx: skin, liver, zygote
  • 12. I. Understanding DNA as a Chromosome 5 Key PointsE. Chromosomes have the ability toREPLICATE or COPY ITSELF Once DNA copies itself, it will contain an identical half