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Biological and Biochemical Foundations of Living Systems

Inheritance Patterns in Drosophila Eye Color

Medium Biology Genetics

As scientists continue to unravel the intricacies of genetics, a common model organism used is the fruit fly, Drosophila melanogaster. This organism has a relatively simple genetic structure, yet it exhibits a variety of phenotypic traits that are influenced by its genetic makeup. In a breeding experiment, a researcher observes that a strain of flies exhibiting white eyes is crossed with a strain exhibiting red eyes. The resultant F1 generation all display red eyes, but when the F1 generation is intercrossed, the F2 generation produces flies with both red and white eyes in a ratio of approximately 3:1. This classic Mendelian inheritance suggests that the red eye color is dominant to the white eye color.

Based on this information, which of the following statements best describes the inheritance pattern of eye color in Drosophila melanogaster?

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