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Biology H-Mr.Willets
1) For what three purposes might a cell divide? Do all organisms have cells that divide for all three reasons? Explain. Are there cells that don't divide? Give examples.
2) Compare the end result of mitosis to the end result of meiosis.
3) Review the stages of mitosis and what occurs in each stage.
4) Review the phases of the cell cycle and what happens during each.
5) Compare cytokinesis in plant and animal cells.
6) What is a chromatid in relation to a chromosome? What attaches chromatids to each other? How do these attached chromatids compare to each other? What process creates these identical chromatids? When does a chromatid become a chromosome?
7) What type of cell division is used for asexual reproduction. How does the parent compare to the offspring? What name can we give offspring of this kind? Review the examples of asexual reproduction.
8) Write a single coherent sentence that uses the following words: fertilization, development, gametes and zygote. You may use other forms of the words. You may write two sentences if you prefer.
9) Compare male gametes to female gametes. What are the symbols for male and female?
10) Describe what the following terms mean- internal fertilization; external fertilization; in vivo fertilization; in vitro fertilization;
11) What is a hermaphrodite? What do the terms self-fertilization and cross-fertilization mean regarding hermaphrodites? What does protoandrous mean?
12) Most cells have chromosomes that occur in pairs - what are these pairs called? A cell with both members of each pair is called what? How many pairs do humans have?
13) How does the DNA of the members of a pair compare to each other?
14) How many chromosomes do gametes have compared to regular body cells? (be specific). What name is given to a cell with this number of chromosomes?
15) Use the words: haploid, diploid, zygote and gamete- to describe what happens during fertilization.
16) What abbreviations are used for haploid and diploid?
17) Draw a simple diagram showing what happens during spermatogenesis. Choose a small 2N number. Do the same for oogenesis. The process of oogenesis begins with what cell? The process of spermatogenesis begins with what cell?
18) What is parthenogenesis?
19) Use the following words to describe what happens during development: zygote, gastrula, blastula, cleavage and germ layers.
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