12. A diploid cell has 28 chromosomes. When meiosis occurs, how many chromosomes

Question

12. A diploid cell has 28 chromosomes. When meiosis occurs, how many chromosomes are there during Prophase I? a. 14 chromosomes b. 28 chromosomes c. 56 chromosomes d. 84 chromosomes 13. Solution A is a 0.5M glucose solution while solution B is a 0.25M fructose solution. Both are separated by a semi- permeable membrane that prevents fructose and glucose from crossing while allowing water to cross. What will happen to the solutions? a. Water will move from side A to side B b. Water will move from side B to side A C. Fructose and glucose will move to opposite sides d. There will be no net movement of water and sugars

Explanation / Answer

12. Answer is a. 14 chromosomes

In Diploid cell (2n), the number of chromosome is condensed from 2n to n

Therefore if there is 28 (2n) chromosomes in diploid cell then during prophase I of meiosis, the number of chromosome is 14 (n).

13. Answer is b. Water will move from side B to side A

Solution A is glucose solution and solution B is fructose solution. Both are separated by a semi permeable membrane that prevents fructose and glucose from crossing while allowing water to cross. Water will move from side B to side A, because side B (0.25M) is less concentrated as compared to side A solution (0.5M). Osmosis occur from dilute solution to concentrate solution.

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