Science Quiz (FINAL)

• • Chromosomes -All living things contains a self-replicating genetic materials that directs the activities and functions of the cells.
• PARTS OF THE CHROMOSOMES

  • Centromere - This is the central or middle of chromosomes.
  • Heterochromatin - This id the darkly staining region.
  • Euchromatin - This is the lightly staining region.
  • SisterChromatids - The two things.
  • PArm - This is the upper arms of chromosomes.
  • QArm - This is the lower arms of chromosomes.
• Chromatids - Two identical halves of a replicated chromosome after the synthesis phase or The S Phase of the cell cycle
• Centromere - Attachment points of the two chromatids of s chromosome. It is also described as the construction point which divides the chromosome into two sections, or "arms
• Short Arm or P Arm - Upper arms of the chromosomes which is shorter.
• Q Arm - lower arms on the chromosomes which is usually longer
• Deoxyribonucleic Acid - Is the genetic material located inside a chromosome in the nucleus of the cell.
• Human have - 46 chromosomes.
• 40 - House Mouse
• Chimpanzee - 48
• Maize - 20
• Cell Cycle - The chromosomes of a cell change their form as they undergo cell their form one stage to another in a typical cell cycle
• 2 Stages of Cell cycle?

  • Interphase
  • CellDivision or Mitotic Phase
• Interphase = where the chromosomes are long and extended

  = It obtains nutrient and metabolizes, grows, replicates its DNA in preparation for Mitosis
• 3 Substage of Interphase

  • G1
  • S Phase
  • G2
• FIRST GAP OR G1

  CELL GROWS INITIALLY

  SYNTHESIS OF PROTEIN AND RIBONCLEUIC ACID OR RNA OCCURS MITOCHONDRIA INCREASE IN  NUMBER