Unit 4: Cell Cycle Intro

Unit 4: Cell Cycle Introduction

Review the CELL THEORY

​Cell Theory States

All Cells come from pre-existing cells

All Living things are made up of 1 or more cells

Cells are the basic unit of life

Multiple Choice

If an organism has only have 1 type of cell, they are considered

• Unicellular

• Monocellular

• Multicellular

• Polycellular

​It all starts with DNA!

It is the universal language and it is the blueprint of all living things.

It is a type of NUCLEIC ACID and it is housed in the Nucleus of Eukaryotic cells.

DNA can coil up and become something known as CHROMOSOMES, Chromatin!

​More specific

​

Chromosome Structure

Humans have 46 Chromosomes in total

Chromosomes are inside of all Cells, because DNA IS IN ALL LIVING THINGS.

DNA/Chromosomes must be able to equally divide inside of the Cell cycle to make cells in the body

Multiple Choice

Why do you think new cells need to be made using the Cell cycle?

• Just for fun

• To grow new cells

• To reproduce

• To repair damaged cells

VOCABULARY

Kinetochore: Where spindle Fibers
Attach to the chromosome
(for cell division/cell cycle)

VOCABULARY

Centrosome: (In the cytoplasm)
Is the unit of centrioles/spindle fibers that migrate to opposite "poles" of the cell to aid in cell division


Centriole: In the cytoplasm of cells and it produces spindle fibers to help with cell division (occurs in pairs)

Vocabulary Continued

​Cytokinesis (Splitting of the cell)

The process at the end of the Cell cycle that splits the original cell into TWO identical daughter cells.

Multiple Choice

This is what occurs when the original cell splits into TWO CELLS

• Centriole

• Mitosis

• Cytokinesis

• Chromosome

Multiple Choice

This is a Karyotype (it shows the chromosomes of an organism). How many chromosomes are shown?

• 12

• 23

• 22

• 45

Draw

Draw One DUPLICATED CHROMOSOME