The Cell Cycle

Question 1

why do somatic cells undergo cell division?

Answer 1

during the cell cycle, somatic cells (body cells) reproduce through controlled growth and division. it is growth, repair (damaged tissues and organs), replacement (dying or dead cells)

Question 2

key events during interphase (3)

Answer 2

• growth and metabolic activity
• DNA is replicated
• centrioles replicate, cells prepare for cell division

Question 3

key events during prophase (5)

Answer 3

• chromatin condenses into chromosomes
• two identical sister chromatids are joined together by centromere
• nuclear membrane breaks down
• centrioles move to opposite poles of the cell
• spindle fibres form

Question 4

key events during metaphase (1)

Answer 4

-the spindle fibres from centrioles line up the chromosomes along the equator

Question 5

key events during anaphase (2)

Answer 5

• centromeres split and sister chromatids break apart
• spindle fibres shorten and split chromosomes to opposite poles of the cell

Question 6

key events during telophase (3)

Answer 6

• chromosomes condense into chromatin
• nuclear membrane reforms
• spindle fibres break down and centriole reappear