Match the images of centrosomes with the stage of the cell cycle to which you think they belong. A B n D A C [Choose] [Choose ] [Choose] [Choose ] B D

List the phases of the cell cycle and describe the key events of each phase.

Draw and label G1 and G2 stages of interphase and each stage of mitosis (in order) for a cell that has two large and two small chromosomes, 2n=4. For unreplicated chromosome draw a line ( / ) and for replicated chromosome draw an X. Since we are focusing on the DNA, you can skip drawing the nuclear membrane or spindle fibers. For simplicity, do not indicate that the chromosomes are decondensed chromatin during interphase.  Mark and label a place on one of the large chromosomes with the dominant allele of the “A” gene and put the recessive allele “a” on the other homolog. Mark and label a place on one of the small chromosomes with allele “B” and put the recessive allele “b” on the other homolog.

In your own words, briefly explain the different phases of the cell cycle. Explain what events take place at each phase