Here as shown in diagram gene G is responsible for long- wings in fruit fly. It is a genetic trait attributed to wing size.
Genetic trait of wing size in fruit flies
Gene G is responsible for long- wings.
Gene g is responsible for shorter wings in fruit flies.
A cross between these two genes gives Gg where G is a dominant allele and hence daughter fruit flies having longer wings will be produced.
To know more about genetic inheritance :
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