Biology, 8e Campbell Chapter 15 The Chromosomal Basis of Inheritance

Biology, 8e Campbell Chapter 15 The Chromosomal Basis of Inheritance

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1 Biology, 8e (Campbell) Chapter 15 The Chromosomal Basis of Inheritance Multiple‐Choice Questions 1) Why did the improvement of microscopy techniques in the late 1800s set the stage for the emergence of modern genetics? A) It revealed new and unanticipated features of Mendel's pea plant varieties. B) It allowed the study of meiosis and mitosis, revealing parallels between behaviors of genes and chromosomes. C) It allowed scientists to see the DNA present within chromosomes. D) It led to the discovery of mitochondria. E) It showed genes functioning to direct the formation of enzymes. Answer: B Topic: Concept 15.1 Skill: Knowledge/Comprehension 2) When Thomas Hunt Morgan crossed his red‐eyed F1 generation flies to each other, the F2 generation included both red‐ and white‐eyed flies. Remarkably, all the white‐eyed flies were male. What was the explanation for this result? 3) Morgan and his colleagues worked out a set of symbols to represent fly genotypes. Which of the following are representative? A) AaBb × AaBb B) 46, XY or 46, XX C) vg+vgse+se × vgvgsese D) +2 × +3 Answer: C Topic: Concept 15.1 Skill: Knowledge/Comprehension 4) Sturtevant provided genetic evidence for the existence of four pairs of chromosomes in Drosophila in which of these ways? A) There are four major functional classes of genes in Drosophila. B) Drosophila genes cluster into four distinct groups of linked genes. C) The overall number of genes in Drosophila is a multiple of four. D) The entire Drosophila genome has approximately 400 map units. E) Drosophila genes have, on average, four different alleles. Answer: B Topic: Concept 15.1 Skill: Knowledge/Comprehension 2 5) A man with Klinefelter syndrome (47, XXY) is expected to have any of the following
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EXCEPT 6) A woman is found to have 47 chromosomes, including 3 X chromosomes. Which of the following describes her expected phenotype?
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