3.3b Cell Division

Question 1

The series of changes a cell goes through from the time it is formed until it divides

Answer 1

Cell life cycle

Question 2

Name the two major periods of the cell life cycle

Answer 2

Interphase (metabolig phase)

Cell Division

Question 3

The DNA molecule is duplicated exactly in a process called ___

Answer 3

DNA replication

Question 4

The process of dividing a nucleus into two daughter nuclei with exactly the dame genes as the mother nucleus

Answer 4

Mitosis

Question 5

Events of Cell Division:

As cell division begins, the chromatin threads coil and shorten so that the barlike chromosomes become visible under a microscope

Answer 5

Prophase

Question 6

Each chromosome is made up of two identical strands called sister ___, held together by a small buttonlike body called a ___

Answer 6

Chromatids, Centromere

Question 7

The centrioles separate from each other and begin toward opposite sides of the cell, directing the assembly of a ___

Answer 7

Mitotic Spindle

Question 8

Events of Cell Division:

In this short stage, the chromosomes line up at the metaphase plate so that a straight line of chromosomes is seen

Answer 8

Metaphase

Question 9

Events of Cell Division:

During this phase, the centromeres that have held the chromatids together split

Answer 9

Anaphase

Question 10

Events of Cell Division:

Is essentially prophase in reverse. The chromosomes at opposite ends of the cell uncoil to become threadlike chromatin again

Answer 10

Telophase

Question 11

The division of the cytoplasm

Answer 11

Cytokinesis

Question 12

A contractile ring made of microfilaments forms a ___ over the midline of the spindle, and it eventually squeezes, or pinches, the original cytoplasmic mass into two parts

Answer 12

Cleavage furrow