OUTLINE 10 — CELL CYCLE

What are the phases of the cell cycle in order?

G1 → S → G2 → M.

What occurs during G1 of interphase?

cell growth, normal cellular functions, and gene expression

what occurs during S phase?

DNA Replication

does DNA replication during S phase change ploidy?

No

If a cell starts S phase as n=3, what is n at the end of S phase?

n=3, still a haploid

After S phase in a haploid cell with n=3, how many chromosomes are present?

3 chromosomes

After S phase in a haploid cell with n=3, how many sister chromatids are present?

6 sister chromatids

what occurs during G2

preparation for mitosis

What happens during prophase of mitosis

chromosomes condense, nuclear envelope breaks down, mitotic spindle forms

What happens during metaphase

chromosomes line up at the metaphase plate

what happens during anaphase

sister chromatids separate and move to opposite poles

what happens during telophase

nuclear envelope reform and chromosomes decondense

what is cytokinesis

division of the cytoplasm

does chromosome duplication change chromatid number

yes chromatids double

what does ploidy refer to?

the number of complete sets of chromosomes in a cell