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An Experimenter Crosses Two Fruit Flies with Different Phenotypes

Question 18

Multiple Choice

An experimenter crosses two fruit flies with different phenotypes. The results in the F2 generation are: 478 crooked legs, trembling behavior 372 stumpy legs, circling behavior 175 crooked legs, circling behavior 98 stumpy legs, trembling behavior What were the genotypes / phenotypes in the Parental generation?


A) Both parents homozygous / Female phenotype: crooked legs, trembling, Male phenotype: stumpy legs, circling
B) Both parents homozygous / Male phenotype: crooked legs trembling, Female phenotype: stumpy legs, circling
C) Both parents heterozygous / Female phenotype: crooked legs, trembling, Male phenotype: crooked legs, trembling
D) Both parents homozygous / Male or female parental phenotype: crooked legs, trembling, Second parental phenotype: stumpy legs, circling
E) Both parents heterozygous / Both parental phenotypes: crooked legs, trembling

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