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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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tomy_uos tomy_uos
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11 years ago
I'm working through this lab simulation for fruit flies. When I mate two flies that have the aristapedia mutation, the phenotype ratio of the F1 generation is 1:2. Apparently, this is supposed to tell me that this mutation is lethal. But HOW? Any help would be appreciated. Thanks!
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sogorovicsogorovic
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11 years ago
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11 years ago
Because the phenotypic ratio with any simple trait (That is, a trait determined by one allele) is 1:2:1, and since you only have 1:2, that means the last 25% didn't make it.

Phenotype is the traits expressed in the organism, if it's dead it has no phenotype.
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