Exam 3 Biology 1408v Version A Ertle Foel free to write on this test. However, o

Question

Exam 3 Biology 1408v Version A Ertle Foel free to write on this test. However, only answers recorded on your scantron will be graded Multiple answer style questions are indicated with "Choose all that apply". there isn't a choose all that apply statement at the beginning of the question, then it is multiple choice and only one answer is correct True/False, Multiple Choice, and Multiple Answer -2 points each (80 points) 1. Human diploid cells have chromosomes, while human cells that are haploid have chromosomes. A. 24...48 B. 48.. 24 C. 23... 46 D. 46... 23 E. 23....23 2. What constitutes a cancerous tumor? A. It involves human cells that do not respond to cell cycle checkpoints and divide uncontrollably B. It is an infection caused by bacteria that are resistant to antibiotics. C. It is a contagious infection caused by a virus. D. It involves human cells that have stopped going through cell division. 3. For every one diploid cell that begins meiosis, how many haploid cells are present at the end of meiosis? A. 4 B. 3 C. 2 D. 1 E. 0 4. Multiple answer. Choose all that apply. What increases genetic variation in a population A. Sexual reproduction B. Crossing over C. Asexual reproduction D. Mitosis

Explanation / Answer

(1)Human diploid cells have 46 chromosomes while human cells that are haloid have 23 chromosomes

D.46...23

(2)A.It involves human cells that do not respond ro cell cycle checkpoints and divide uncontrollably

(3)A.4

A diploid cell undergoes meiosis to produce 4 haploid cells

(4)Option A and B

Sexual reproduction and crossing over increases genetic variation

Mitosis and asexual reproduction on the other hand do not contribute to genetic variation

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