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The wild-type (normal) fruit fly, Drosophila melanogaster, has straight wings and long bristles. Mutant strains have been isolated with either curled wings or short bristles. The genes representing these two mutant traits are located on separate chromosomes. Carefully examine the data from the five crosses below. (a) For each mutation, determine whether it is dominant or recessive. In each case, identify which crosses support your answer; and (b) define gene symbols and determine the genotypes of the parents for each cross. Cross 1. straight, short X straight, short 2. straight, long X straight, long 3. curled, long x straight, short 4. straight, short X straight, short 5. curled, short X straight, short Number of Progeny straight straight curled wings, wings, wings, long short long bristles bristles bristles 30 90 10 120 40 40 0 40 120 40 40 0 curled wings, short bristles 30 0 40 0 20 60 20 60

The wild-type (normal) fruit fly, Drosophila melanogaster, has straight wings and long bristles. Mutant strains have been isolated with either curled wings or short bristles. The genes representing these two mutant traits are located on separate chromosomes. Carefully examine the data from the five crosses below. (a) For each mutation, determine whether it is dominant or recessive. In each case, identify which crosses support your answer; and (b) define gene symbols and determine the genotypes of the parents for each cross. Cross 1. straight, short X straight, short 2. straight, long X straight, long 3. curled, long x straight, short 4. straight, short X straight, short 5. curled, short X straight, short Number of Progeny straight straight curled wings, wings, wings, long short long bristles bristles bristles 30 90 10 120 40 40 0 40 120 40 40 0 curled wings, short bristles 30 0 40 0 20 60 20 60

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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The wild-type (normal) fruit fly, Drosophila melanogaster, has straight wings and long bristles. Mutant strains have been isolated with either curled wings or short bristles. The genes representing these two mutant traits are located on separate chromosomes. Carefully examine the data from the five crosses below. (a) For each mutation, determine whether it is dominant or recessive. In each case, identify which crosses support your answer; and (b) define gene symbols and determine the genotypes of the parents for each cross. Cross 1. straight, short X straight, short 2. straight, long X straight, long 3. curled, long X straight, short 4. straight, short X straight, short 5. curled, short X straight, short straight wings, long bristles 30 120 40 40 20 Number of Progeny straight curled wings, wings, short long bristles bristles 90 10 0 40 120 60 40 40 0 20 curled wings, short bristles 30 0 40 0 60
Transcribed Image Text:The wild-type (normal) fruit fly, Drosophila melanogaster, has straight wings and long bristles. Mutant strains have been isolated with either curled wings or short bristles. The genes representing these two mutant traits are located on separate chromosomes. Carefully examine the data from the five crosses below. (a) For each mutation, determine whether it is dominant or recessive. In each case, identify which crosses support your answer; and (b) define gene symbols and determine the genotypes of the parents for each cross. Cross 1. straight, short X straight, short 2. straight, long X straight, long 3. curled, long X straight, short 4. straight, short X straight, short 5. curled, short X straight, short straight wings, long bristles 30 120 40 40 20 Number of Progeny straight curled wings, wings, short long bristles bristles 90 10 0 40 120 60 40 40 0 20 curled wings, short bristles 30 0 40 0 60
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