Number of Progeny wings, long bristles straight straight curled wings, short bristles wings, long curled wings, short bristles bristles Cross 1. straight, short x straight, short 30 90 10 30 2. straight, long X straight, long 120 40 3. curled, long X straight, short 40 40 40 40 4. straight, short X straight, short 5. curled, short x straight, short 40 120 60 20 60 20

Biology 2e
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ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark
Chapter29: Vertebrates
Section: Chapter Questions
Problem 16RQ: Which of the following feather types helps to reduce drag produced by wind resistance during flight?...
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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.

Number of Progeny
wings,
long
bristles
straight straight curled
wings,
short
bristles
wings,
long
curled
wings,
short
bristles bristles
Cross
1. straight, short x
straight, short
30
90
10
30
2. straight, long X
straight, long
120
40
3. curled, long X
straight, short
40
40
40
40
4. straight, short X
straight, short
5. curled, short x
straight, short
40
120
60
20
60
20
Transcribed Image Text:Number of Progeny wings, long bristles straight straight curled wings, short bristles wings, long curled wings, short bristles bristles Cross 1. straight, short x straight, short 30 90 10 30 2. straight, long X straight, long 120 40 3. curled, long X straight, short 40 40 40 40 4. straight, short X straight, short 5. curled, short x straight, short 40 120 60 20 60 20
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