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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 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? __________________________________ Both