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Rio Salado BIO101 lab 6

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Question;BIO lesson 7 lab 6;1.;Why are spindle fibers;important for mitosis? (5 points)--Answer below;2.;State the four bases that make;up DNA. (4 points)a.b.c.d.--Answer below;3.;What are the two base pairs? (2;points)a.b.--Answer below;A.;4.;a. Define the term crossing;over. (3 points) b. Explain why;crossing over is important in meiosis. (3 points)--Answer below;5.;What are the two main differences;between mitosis and meiosis? (4 points)a.b.--Answer below;6.;a. Explain the difference;between mitosis and cytokinesis. (3 points) b. When does mitosis occur during;the cell cycle? (1 point) c. When;does cytokinesis occur during the cell cycle? (1 point)--Answer below;7.;Explain the differences that;occur during cytokinesis of plant and animal cells. (5 points)--Answer below;8.;Refer to the image above;labeled A through E. The image details a;stage of the cell cycle for a cell undergoing mitosis. Place the image in correct order by placing;the letters in the correct sequence, according to the stages of mitosis. (5;points)a. Interphaseb. Prophasec.;Metaphased. Anaphasee. Telophase/cytokinesis--Answer below;9.;Refer to the image above. What;stage of mitosis is the cell identified above undergoing? (1 point)--Answer;below;10.;Refer to the image above. Place the cells identified with the letters A;through E in correct order for a cell undergoing mitosis. (5 points)a. interphaseb.;prophasec. metaphased. anaphasee.;telophase/cytokinesis--Answer below;11.;Refer to the data on the corn;kernel color ratio from Part III of the lab.;a. What was the phenotypic ratio from Step 1? (2 points)b. What was the phenotypic ratio;from Step 2? (2 points)c. What was the phenotypic ratio from Step 3? (Remember there were four possible types for;this part of the lab.) (2;points)--Answer below;12.;13.;Recall from the background;information that purple kernels are dominant and yellow kernels are;recessive. The second ear of corn was;the result of crossing two heterozygous ears of corn male purple (Pp x Pp).;This is represented by the Punnett square above. Complete the Punnett square by writing the;correct letters that correspond to each number indicated in the table above. (4;points)a. 1b. 2c.;3d. 4--Answer below;14.;Once the Punnett square for;Question 12 is complete, calculate the ratio of purple and yellow kernels;(recall that if the dominant trait is present, it will be expressed). a. What is the ratio of purple to yellow;kernels based on the Punnett square? (5 points)b. How did this compare to the;ratio obtained from counting the corn kernels for ear number two in part III of;the lab? (5 points)--Answer below;15.;Recall from the background;information that purple kernels are dominant and yellow kernels are recessive.;Also recall that smooth kernels are dominant and wrinkled kernels are;recessive. The third corn ear was the result of crossing a male ear of corn with;the following gametes: PpSs, with a;female ear of corn with the same gametes;PpSs. This is represented by the Punnett square, above. Complete the;Punnett square by writing the correct letters that correspond to each number;indicated in the table (for example, PPSS or ppss). (8 points)--Answer below;16.;Once the Punnett square for;Question 14 is complete, calculate the ratio of corn kernel varieties (recall;that if the dominant trait is present, it will be expressed). a. What is the ratio of kernels based on the;Punnett square? (5 points)b. How does this compare to the ratio obtained from;counting the corn kernels? (5 points)--Answer below;17.;(Application) How might the;information gained from this lab pertaining to mitosis and meiosis be useful to;the student or how can the student apply this knowledge to everyday life as a;non-scientist? (20 points)--Answer below:.

 

Paper#63075 | Written in 18-Jul-2015

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