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Chapter 15 Test Questions

Chapter 15 Test Questions - Chapter 15 Test Questions...

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Chapter 15 Test Questions MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) There is good evidence for linkage when (A)two genes occur together in the same gamete. (B)a gene is associated with a specific phenotype. (C)two genes work together to control a specific characteristic. (D)genes do not segregate independently during meiosis. (E)two characteristics are caused by a single gene. 2) People who have red hair usually have freckles. This can best be explained by (A)linkage. (B)reciprocal translocation. (C)independent assortment. (D)sex-influenced inheritance. (E)nondisjunction. 3) Vermilion eyes is a sex-linked recessive characteristic in fruit flies. If a female having vermilion eyes is crossed with a wild-type male, what percentage of the F 1 males will have vermilion eyes? 4) The following is a map of four genes on a chromosome: Between which two genes would you expect the highest frequency of recombination? E 5) A 0.1% frequency of recombination is observed chromosomes. genes located very close to one another on the same chromosome. 6) A cassette tape or compact disk contains a series of distinct pieces of electrical or physical information that are interpreted by a tape player or compact disk player, resulting in music or video. If the information that produces a song is analogous to a gene, and the tape or compact disk is analogous to a chromosome, then the linkage of genes is analogous to (A)the length of the songs on the tape or disk. (B)the sequence of songs on the tape or disk. (C)the volume of the music on the tape or disk. (D)the tempo of the music on the tape or disk. (E)the informational content of the songs on the tape or disk. 7) New combinations of linked genes are due to assortment. 8) A 50% frequency of recombination means that chromosomes. SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. The following questions refer to the data below and to Figures 15.1 and 15.2. CROSS I. Purebred lines of wild-type fruit flies (gray body and normal wings) are mated to flies with black bodies and vestigial wings. Figure 15.1
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F 1 offspring all have a normal phenotype. Figure 15.2 CROSS II. F 1 flies are crossed with flies recessive for both traits (a testcross).
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