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Exam%204%20Bios%20100%20Spring%202010%20Test%204

Exam%204%20Bios%20100%20Spring%202010%20Test%204 - Bios 100...

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Bios 100 Spring 2010 Test 4 1. In humans, it has been estimated that approximately _____ percent of fertilized eggs fail to develop into viable organisms. A. 0.01% B. 0.1% C. 1 % D. 50% E. 90% 2. It has been estimated that a mature human male makes how many sperm? 3. What is believed to be the main reason for the phenomenon of “crossing over”? A. Ensure the complete separation of cells during meiosis B. Ensure the complete separation of cells during mitosis C. Significantly increase the genetic diversity of gametes D. Ensure that homologous chromosomes are lined up properly in mitosis E. Ensure that autosomes line up properly during embryonic development. 4. “Fertilizin” is thought to play an important process in 5. The wave of calcium that spreads across the cytoplasm of a newly fertilized egg is thought to be involved in 6. How many human individuals have been produced through the process of in- vitro fertilization since its original successful development? A. 1 B. 10 C. 1000 D. 10,000
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E. More than 250,000 Use the following key to describe each of the cells in questions 7-11. A. Omnipotent (totipotent) B. Pluripotent C. Multipotent D. Delipotent E. Unipotent E. 7. Mammary cell of a sheep A. 8. Egg of a human female C. 9. Hematopoetic cell of a human E. 10. Skin cell of a human A. 11. Cells of the inner mass of a blastocyst
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