exam1_orange_answers

exam1_orange_answers - Biology 313 Exam I ANSWERS February...

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Biology 313 – Exam I - ANSWERS February 6, 2008 For this exam, use the ORANGE score sheet Fill in your student ID on the ORANGE score sheet Choose ONE alternative to BEST complete the statement or answer the question. 1. What types of phenotypic ratios are most likely to occur in crosses when dealing with a single gene pair? a. 3:1, 1:1, 1:2:1 b. 1:1:1:1, 1:4:6:4:1 c. 9:7, 12:3:1 d. 9:3:3:1, 1:2:1 e. 15:1, 1:2 2. A white-eyed Drosophila female is crossed with a red-eyed Drosophila male. There are 60 progeny, of which 40 are white-eyed males and 20 are red-eyed females. You use chi-square analysis to test if these results differ from what is expected. Which of the following statements is true: a. chi-squared = 6.7, p-value = approx 1%, the data do not differ from expectations b. chi-squared = 6.7, p-value = approx 4%, the data differ from expectations c. chi-squared = 2.2, p-value = approx 35%, the data do not differ from expectations d. chi-squared = 6.7, p-value = approx 1%, the data differ from expectations e. chi-squared = 2.2, p-value = approx 15%, the data do not differ from expectations 3. The phenomenon in which more double crossovers occur than are expected for a region is called a. chiasma. b. negative interference. c. positive interference. d. synaptonemal complexity. e. reciprocal genetic exchange. 4. Ability to roll the tongue is caused by a dominant allele. A woman is a “roller,” but We forgot to include a chi-square table for you to consult!!!! Therefore, everyone received  credit for this question. If you left it blank or marked the correct answer or marked an  incorrect answer, no matter what, you received credit.
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one of her parents is not. What is the woman's genotype? a. homozygous dominant b. hemizygous c. homozygous recessive d. heterozygous e. cannot be determined from this information 5. What is the probability that on three flips of a coin, heads will occur on all three flips?
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exam1_orange_answers - Biology 313 Exam I ANSWERS February...

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