Name:______Period: ______

Site 1: Meiosis OVERVIEW

Go to my website on the MFHS website. Click on Meiosis Webquest & then click on Site 1: Meiosis Overview. Click on Reproduction and answer the following questions or fill in the blanks.

Sexual Reproduction

  • New individuals are formed by a combination of two ______cells. (______).
  • What is fertilization? ______
  • What are the gametes in females? ______in males? ______
  • Are the gametes haploid? ______. What does that mean in terms of their chromosome number? ______.
  • What is the new individual called? ______. How many chromosomes sets does the individual have? ______. What does diploid mean? ______.
  • Summarize the process of meiosis.

Click next and fill in the blanks below.

  • A diploid (2n) of human chromosome consists of ______chromosomes
  • The haploid (n) number of human chromosomes consists of ______chromosomes
  • ______are all the chromosomes except the sex chromosomes. You receive how many autosome chromosomes from each parent? ______
  • You receive one sex chromosome from each parent. If you are a female what combination did you receive? ______a male? ______
  • Define karyotype:
  • Haploid ( ____ ) has ______set of chromosomes
  • Diploid ( ______) has ______sets of chromosomes
  • Most plants and animals are made of ______cells
  • Eggs and sperm are ______.

Site 2: Meiosis Animation

Go back to my website. Now click on Site 2: Meiosis Animation. Click on the arrow to learn about meiosis and answer the questions below.

  • How many chromosomes does the cell in this animation start with? ______
  • The homologous pairs are represented by similar ______
  • Copies of chromosomes are held together by the ______
  • Each chromosome finds its ______
  • Draw “crossing over”, using your pencil to shade in the areas that exchange parts
  • What phase does crossing over take place in? ______
  • How many chromosomes are at each pole of the cell? ______
  • During meiosis 2, chromosomes line up again along the cell’s ______. What phase does this happen in? ______
  • Only ______copy of each chromosome moves toward the poles. Which means only ______chromosomes of the original six.
  • New membranes form around each ______.
  • Each cell divides, forming a total of ______cells, each with ______of the original number of chromosomes.

Site 3: Mitosis vs. Meiosis

Go back to my website and click on Site 3: Mitosis vs. Meiosis. Read the Introduction and then click on “Launch the Interactive”.

After viewing the animation, fill out the chart below, by placing a check in the box or boxes.

Event / Mitosis Only / Meiosis Only / Both
Two cell divisions
Centrioles appear
Chromosomes pair up
Spindle fibers form
Cytokinesis
Four daughter cells
Crossing over occurs
Daughter cells have the same number of chromosomes
  • Is Interphase in Mitosis the same as Interphase I of Meiosis? ______
  • What is the difference between Prophase of Mitosis & Prophase I of Meiosis?
  • What is the difference between Metaphase of Mitosis & Metaphase I of Meiosis?
  • What is the difference between Anaphase of Mitosis & Anaphase I of Meiosis?
  • Is Anaphase I or II more like Mitotic Anaphase? ______
  • Is Telophase I or II more like Mitotic Telophase? ______