7.2 Study Guide

Question 1

How is DNA stored in the in nucleus the majority of the time?

Answer 1

Chromatin

Question 2

What is a homologous chromosome

Answer 2

2 of each type of chromosome

Question 3

Where do sister chromatids come from

Answer 3

homologous chromosomes after replication

Question 4

alleles

Answer 4

same gene but not necessarily identical

Question 5

Information

Answer 5

DNA replication happens in the S phase, which creates sister chromatids (2 copies) connected at the centromere

Question 6

Before dividing into new cells, ______ condenses into ________

Answer 6

chromatin, chromosome

Question 7

what happens in interphase

Answer 7

DNA is replicated
G1, S, G2
chromatin state

Question 8

prophase

Answer 8

chromatin is condensing
spindle fibers start to form

Question 9

pro-metaphase

Answer 9

nucleus breaks down
spindle fibers connect to chromosomes

Question 10

metaphase

Answer 10

chromosomes align in the middle of the cell

Question 11

anaphase

Answer 11

sister chromatin split apart

Question 12

telophase

Answer 12

division of the nuclei
refer back to chromatin
nuclear membrane reforms
spindle fibers break down

Question 13

cytokineses

Answer 13

actual splitting of the cytoplasm

Question 14

sequence of mitosis

Answer 14

1. chromatin condenses into chromosomes, cell membrane breaks down, spindle fibers begin to form
2. spindle fibers attach to chromosomes and pull them to the middle of the cell
3. centromeres break down and sister chromatids separate and are pilled down the spindle fibers to opposite ends of the cell
4. new membranes form around both sets of sister chromatids, cytokinesis begins