What is a chromosome? Contains Hereditary material Made of protein and DNA During Interphase they duplicate What is a Chromatid? Chromosomes that have duplicated Question 1

Steps of cell division Cell Cycle * Mitosis – 4 phases * Interphase – 1 phase * Cytokinesis – 1 phase

Types of nuclear division Mitosis – asexual reproduction Meiosis – sexual reproduction

Mitosis Produces two identical daughter cells Each daughter cell has the same kind and number of chromosomes as the original parent cell Nucleus divides in half Question 2

Interphase Chromosomes cannot be seen Chromosomes duplicate and double in number Contains 3 sub phases called G1, S,G2 Question 3/4

Prophase(Mitosis Begins) Chromosomes become visible Each chromosome consists of two identical chromatids chromatidscentromere nuclear membrane disappearing Centromere – holds chromatids together

Metaphase Chromosomes line up at the equator (middle of the cell) Spindles are formed to attach to the centromere of each chromosome

Anaphase chromatids separate as individual chromosomes They move apart towards the opposite sides chromosomes

Telophase Chromosomes gradually disappear Nuclear membrane is formed around each set of chromosomes nuclear membrane forming Cell pinches in

Cytokinesis Division of cytoplasm Animal cells : by formation of cleavage furrow cleavage furrow cell plate Plant cells : by formation of cell plate Two new cells

Interphase Animal cell Plant cell

Prophase Animal cell Plant cell

Metaphase Animal cell Plant cell

Anaphase Animal cell Plant cell

Telophase Animal cell Plant cell

Can you identify the different stages of Cell division from the diagram below? metaphase anaphase prophase interphase telophase

Which phase of the cell cycle is this cell in? 1. Interphase 2. metaphase

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Which phase of mitosis in the cell in? 1. Telophase 2. Anaphase

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Which phase is this cell in? 1. Prophase 2. Anaphase

What phase is this cell in? 1. Metaphase 2. Telophase

What phase is this in? 1. Anaphase 2. Metaphase.

Which picture shows the chromatids lining up in the middle. Click number to check yourself 1 2 3

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Label the following pictures of Mitosis. Put answers on paper click here click here When finished labeling click hereclick here

You have now completed the power point lesson on Mitosis Click one of the following to describe your understanding of Mitosis I get it I get some of itI get a little of it I’m kinda lostI have no Idea

Let’s see if you really do get it? Can you answer the following questions? Without any help 1.What is a chromosome 2.What is mitosis 3.What are the phases of mitosis If you can answer these then click hereclick here

Great you understand most of it but not all! What are you missing? Look at the following concepts and click the ones you are unsure of. 1. What is Mitosis 2. Stages of mitosis 3. What is a chromosomeWhat is a chromosome

You only understand a Little! Click here Click here to go back and review.

You need to review your notes some more and Click here

If you have all pictures labeled then click here

Check yourself! Did you get them right? click here click here when done checking Metaphase Anaphase Telophase Prophase