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? A. 1000 per second B. 1000 per day C. 1000 per week D. 1000 per year E. 1000 over the course of their lifetime. 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 A. increasing the probability that sperm survive their trip through the vagina and uterus B. Increasing the likelihood of crossing over during gametogensis C. Increasing the amount of eggs released and available for fertilization D. Increasing the likelihood that twins develop E. Ensuring that sperm released in the ocean bind to eggs of the same species. 5. The wave of calcium that spreads across the cytoplasm of a newly fertilized egg is thought to be involved in A. Fusion of the male and female chromosomes B. Destruction of cells containing damaged chromosomes C. The development of the fertilization envelope to block additional sperm entry D. The rapid disintegration of mitochondria from the sperm E. None of the above 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 12. Induced pluripotent cells differ from embryonic stem cells in that A. They have twice as many chromosomes B. Induced cells are derived directly from a newly fertilized egg obtained from in- vitro-fertilization C. They can only develop into cells of ectodermal origin
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This note was uploaded on 03/06/2011 for the course BIOS 100 taught by Professor Kelso during the Spring '07 term at Ill. Chicago.

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

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