Suppose that you have 72 F2 flies from a cross, and expected that they would show a phenotype ratio of: 9 red eye/normal wings : 3 red eye/dumpy wings : 3 eyeless/normal wings : 1 eyeless/dumpy wings How many flies that eyeless with normal wings would you expect to have? O 13.5 40.5 0 3 18.5

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A: Phenotype  The visible or observable trait of an organism that is form due to expression of gene.

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Q: Suppose that you have 72 F2 flies from a cross, and expected that they would show a phenotype ratio…

A: It is a dihybrid cross because two traits are involved in this case.

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.