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In Drosophila,the Phenotype Bar-Eye Is Due to a Tandem Duplication

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In Drosophila,the phenotype bar-eye is due to a tandem duplication of several bands on the X chromosome.Occasionally (1 out of 1600),all true-breeding stocks of bar-eyed flies yield an even more extreme phenotype called ultrabar,which is in fact due to a triplication of this chromosomal segment.The hypothesis used to explain ultrabar's origin is that a slight mispairing of chromosomes can occur whenever there is a duplication.If crossing-over occurs (in females),then recombinants would form as follows: In Drosophila,the phenotype bar-eye is due to a tandem duplication of several bands on the X chromosome.Occasionally (1 out of 1600),all true-breeding stocks of bar-eyed flies yield an even more extreme phenotype called ultrabar,which is in fact due to a triplication of this chromosomal segment.The hypothesis used to explain ultrabar's origin is that a slight mispairing of chromosomes can occur whenever there is a duplication.If crossing-over occurs (in females),then recombinants would form as follows:    What other evidence,not involving cytological observation,would you seek to substantiate this hypothesis? Be as exact as you can.There are at least two possible answers.
What other evidence,not involving cytological observation,would you seek to substantiate this hypothesis? Be as exact as you can.There are at least two possible answers.


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Groups that reject the dominant societal norms and values, often creating their own cultural norms in opposition to mainstream culture.

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The dominant set of cultural practices, beliefs, and values that are widely shared and accepted within a particular society.

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