Exam 1 (2009)

Exam 1 (2009) - Genetics Test 2009 1) In Meiosis, the...

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Genetics Test 2009 1) In Meiosis, the stages of Prophase I are: a. Leptotene, Zygotene, Pachytene, Diplosomia, Telekinesis b. Leptin, Zygotes, Polydactyl, Diplosomia, Diakinesis c. Leptotene, Zygotene, Pachytene, Diplotene, Diakinesis d. Leptin, Zygotes, Pachytene, Diplosomia, Diakinesis e. Leptotene, Zygosis, Polydactyl, Diplotene, Diakinesis 2) Which of the following statements is not true? a. Genes are capable of existing in several states (alleles), each having detectable effects. The change from one such state to another is known as mutation. b. Each chromosome has many genes, and these are arranged in a linear order. c. The order of genes along a chromosome is altered through the process of recombination. d. Every gamete receives one chromosome of each homologous pair. This distribution of chromosomes to the gametes is a matter of chance. e. The distribution to the gametes of the chromosomes of one homologous pair has no effect on the distribution of the chromosomes of the other pairs. Question 3-6: you have performed the following dihybrid cross in Drosophila using the black body color (b) and vestigial wings (vg) mutations. The b+ (grey body) and vg+ (normal wing) are dominant wild type alleles. These genes are autosomal. Female ♀ b+ vg+ X male b vg b vg b vg Progeny: Phenotype # of Progeny Grey body normal wing 965 Black body vestigial wing 944 Grey body vestigial wing 206 Black body normal wing 185 3) Assuming independent segregation what is the value for χ 2 ? a. 3 b. 2300 c. 1002.6 d. 0.25 e. 0.05
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4) How many degrees of freedom for this chi square test? a. 1 b. 2 c. 3 d. 4 e. 0 5) Referring to the χ 2 table below, which of the following statements is true: a. The probability of having a χ 2 value this large is greater than or equal 0.05 b. The data supports independent segregation c. In this experiment, any χ 2 value equal to or greater than 7.815 is significant and the hypothesis is rejected d. In this experiment, any χ 2 value equal to or greater than 5.024 is significant and the hypothesis is rejected e. The χ 2 value proves linkage 6) Assuming Linkage between black and vestigial , the estimated recombination frequency would be: a. 0.17 b. 0.085 c. 0.204
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d. 0.36 e. 0.50 Question 7 – 10 refer to the following pedigree segregating a dominant trait and a microsatellite with three morphs (M1, M2, and M3): 7) If II-1 would have another child, what is the probability that this progeny would inherit the dominant trait? a. 0.05
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Exam 1 (2009) - Genetics Test 2009 1) In Meiosis, the...

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