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The eyeless trait is recessive in Drosophila. One of the offspring of a cross between heterozygote (Ee) parents has eyes. How
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22. Answer: Option C is correct
Explanation:
Parental cross: Ee X Ee
Progeny: EE Ee Ee ee
To determine the genotype of an individual with a dominant phenotype, a test cross is performed.
Test cross: A cross with a recessive homozygous parent (Eyeless fly)

EE X ee ---> All progeny contain eyes

Ee X ee ---> Ony 50% progeny contain eyes

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