Draw a line down the middle of the page. On the LEFT side of the line, draw and label the following stages of Meiosis (in order): Metaphase I (one circle at the top of the page), Metaphase II (two circles, in the middle of the page) and gamete (four circles, at the bottom of the page). Start with a cell that is 2n=4 with two large and two small chromosomes. Make one “set” (one large and one small chromosome) the same color, and the other set a different color. Label one of the large chromosomes with allele “A” and the other allele “a”, like we did in class. Label one of the small chromosomes with allele “B” and the other allele “b”.) For replicated chromosome draw an X and for single chromatids draw a line ( / ). Since we are focusing on the DNA, you can skip drawing the nuclear membrane or spindle fibers. For simplicity, do not indicate crossover in your diagrams. Now on the right side of the line on your page, please draw the second independent way homologs could line up Metaphase I (one circle). Draw the Metaphase II (two circles) and gamete (four circles) beneath this. Notice that there are 8 circles but only 4 types of gametes on your page. Label gametes as AB, ab, Ab or aB
Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
, Draw a line down the middle of the page. On the LEFT side of the line, draw and label the following stages of Meiosis (in order): Metaphase I (one circle at the top of the page), Metaphase II (two circles, in the middle of the page) and gamete (four circles, at the bottom of the page). Start with a cell that is 2n=4 with two large and two small chromosomes. Make one “set” (one large and one small chromosome) the same color, and the other set a different color. Label one of the large chromosomes with allele “A” and the other allele “a”, like we did in class. Label one of the small chromosomes with allele “B” and the other allele “b”.) For replicated chromosome draw an X and for single chromatids draw a line ( / ). Since we are focusing on the DNA, you can skip drawing the nuclear membrane or spindle fibers. For simplicity, do not indicate crossover in your diagrams.
Now on the right side of the line on your page, please draw the second independent way homologs could line up Metaphase I (one circle). Draw the Metaphase II (two circles) and gamete (four circles) beneath this. Notice that there are 8 circles but only 4 types of gametes on your page. Label gametes as AB, ab, Ab or aB
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