Mitosis and dna replication

• what phase are at the beginning of mitosis?

  prophase
• What phases are in the middle of mitosis?

  Metaphase and Anaphase
• What phases are at the end of mitosis?

  Telophase and Cytokinesis (technically not a part of mitosis)
• G1 phase: the first phase of the cell cycle, where the cell grows
• G2 phase: cell continues to grow and prepare for cell division
• interphase: cell is not dividing or undergoing mitosis, but still preparing for cell division
• G0 phase: cells that completely stop dividing and leave the cell cycle
• Chromosome: DNA that is TIGHTLY coiled around proteins
• Chromatin: LOOSE, uncoiled DNA
• S phase: cell grows and replicated it’s DNA
• Centromere: where sister chromatids are joined together
• Prophase: DNA condenses, nuclear envelope disappears

  
• Metaphase: Chromosomes line up along the middle of the cell.

  
• Anaphase: sister chromatids pull apart, most important phase

  
• Telophase: two new daughter nuclei form, nuclear envelope reforms, chromosomes uncoil

  
• Cytokinesis: division of cytoplasm
• why do cells need to divide?

  responsible for growth, development, and repair of damaged cells
• What does DNA polymerase do?

  builds complementary strands of DNA by matching up base pairs
• Purpose of helicas in DNA replication?

  breaks H bonds to “unzip” a DNA molecule
• When does DNA replication occur?

  S-phase of interphase
• look at this

  
• cell cycle

  
• sister chromatids: two identical chromosomes that are joined by a centromere