Lab 8 Mitosis and Meiosis Online Lab Worksheet

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Lab 8 Mitosis and Meiosis Online Lab Worksheet

I. Tutorial: (1) What is Mitosis & Meiosis? | Complete | Animated Explanation - YouTube

Watch and listen to the tutorial found in the link above. Stop and replay anything you do not

understand – this is a complicated topic! Also study the attached Lab 8 Background

materials.

II. Click here: CELLS alive!

Note: if you cannot open the link, you may just copy the link and paste it into another

browser such as Google Chrome, Firefox.

Go to “Interactive Eukaryote Cell Cycle” on the website and then, click “Cell Cycle”,

“Mitosis”, and “Meiosis”, respectively. Then, study the Cell Cycle overview and click

“START THE ANIMATION” for each part to conduct the virtual lab.

Then, answer the following questions:

1. What is the difference between haploid and diploid?

The main difference between haploid cells and diploid cells is diploid cells have two

complete sets of chromosomes, while haploid cells only have one complete set of

chromosomes

2. What is the cell cycle? Is it present in both cell divisions, mitosis and meiosis?

The cell cycle is an ordered set of events, culminating in cell growth and division into

two daughter cells. Non-dividing cells not considered to be in the cell cycle. The

stages, pictured to the left, are G1-S-G2-M. The G1 stage stands for "GAP 1". The S

stage stands for "Synthesis". This is the stage when DNA replication occurs. The G2

stage stands for "GAP 2". The M stage stands for "mitosis", and is when nuclear

(chromosomes separate) and cytoplasmic (cytokinesis) division occur.

In mitosis, there is only one cell division, making two identical daughter cells, each

identical with the mother and one another, and having 2n chromosomes, called

diploid.

In meiosis, there are two cell divisions, making 4 daughter cells, all different from the

mother and from one another. The chromosomes only divide once, so each new cell

only has n chromosomes and is therefore called haploid.

3. What is the longest phase of the cell cycle? What does the cell do during this phase?

G1 is typically the longest phase of the cell cycle. This can be explained by the fact

that G1 follows cell division in mitosis; G1 represents the first chance for new cells

have to grow. Cells usually remain in G1 for about 10 hours of the 24 total hours of the

cell cycle.

4. What are Homologous chromosomes? Explain Sister Chromatids.

Homologous chromosomes are a set of chromosomes (one from each parent), that are

very similar to one another and have the same size/shape.

Sister chromatids are two identical copies of the same chromosome formed by DNA

replication, attached to each other by a structure called the centromere. During cell

division, they are separated from each other, and each daughter cell receives one copy

of the chromosome.

5. Explain alleles.

An allele is an alternative form of a gene (one member of a pair) that is located at a

specific position on a specific chromosome. These DNA coding’s determine distinct

traits that can be passed on from parents to offspring through sexual reproduction.

The process by which alleles are transmitted was discovered by scientist and abbot

Gregor Mendel (1822–1884) and formulated in what is known as Mendel's law of

segregation.

6. Name the phases of Mitosis.

Mitosis consists of four basic phases: prophase, metaphase, anaphase, and

telophase.

7. What is Cytokinesis?

Cytokinesis, the division of the cytoplasm to form two new cells, overlaps with the

final stages of mitosis. It may start in either anaphase or telophase, depending on the

cell, and finishes shortly after telophase.

8. Identify the stages of these cells in mitosis:

A. Metaphase B. Telophase C. Early Prophase

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Lab 8 Mitosis and Meiosis Online Lab Worksheet I. Tutorial: (1) What is Mitosis & Meiosis? | Complete | Animated Explanation - YouTube Watch and listen to the tutorial found in the link above. Stop and replay anything you do not understand – this is a complicated topic! Also study the attached Lab 8 Background materials. II. Click here: CELLS alive! Note: if you cannot open the link, you may just copy the link and paste it into another browser such as Google Chrome, Firefox. Go to “Interactive Eukaryote Cell Cycle” on the website and then, click “Cell Cycle”, “Mitosis”, and “Meiosis”, respectively. Then, study the Cell Cycle overview and click “START THE ANIMATION” for each part to conduct the virtual lab. Then, answer the following questions: 1. What is the difference between haploid and diploid? The main difference between haploid cells and diploid cells is diploid cells have two complete sets of chromosomes, while haploid cells only have one complete set of chromosomes 2. What is the cell cycle? Is it present in both cell divisions, mitosis and meiosis? The cell cycle is an ordered set of events, culminating in cell growth and division into two daughter cells. Non-dividing cells not considered to be in the cell cycle. The stages, pictured to the left, are G1-S-G2-M. The G1 stage stands for "GAP 1". The S stage stands for "Synthesis". This is the stage when DNA replication occurs. The G2 stage stands for "GAP 2". The M stage stands for "mitosis", and ...
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Tags: Haploid Diploid Metaphase anaphase Telophase