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In fruit flies, gray body color (G) is dominant to black bod…
In fruit flies, gray body color (G) is dominant to black body color (g), and normal wings (N) are dominant to vestigial wings (n). A student performs a testcross between a heterozygous fly (GgNn) and a double recessive fly (ggnn). If the genes assort independently, a 1:1:1:1 phenotypic ratio is expected. The student obtains the following results: Phenotype Observed Number Gray body, normal wings 58 Gray body, vestigial wings 42 Black body, normal wings 39 Black body, vestigial wings 61 Calculate the chi-square value and determine the most reasonable conclusion.
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