4. what two main things happen during Prophase of Mitosis? Why is each necessary for the cell to divide? What
would happen if those steps didn't take place?

The two main things happen during Prophase of Mitosis are given below.

1) In prophase stage of mitosis, condensation of chromosomes occurs which is necessary for the formation of daughter cells.

2) Breakdown of nuclei occurs and moves to the opposite poles.

If this phase is not take place during mitosis, the cell will not divide into daughter cells

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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