Ebony (black body, e ) and apterous (vestigial wings, vg ) are recessive traits,

Question

Ebony (black body, e) and apterous (vestigial wings, vg) are recessive traits, present on different chromosomes. An ebony female with wild-type wings (whose parents were true breeding for wild-type wings) is crossed with an apterous male with wild-type (brown) body color (whose parents were true breeding for wild-type body color).

A. What are the genotypes of the parental flies?

B. List the genotype(s) and phenotype(s) you expect to see in the F1 offspring. Explain how you arrived at your answer.

Explanation / Answer

Let ' e' be the allele for ebony

Let 'E' be the allele for Brown body(wild type body)

Let 'vg' be the allele for Vestigial wings

Let VG bet the allele for wild type wings.

Cross between Ebony female, wild type wings ( eeVGVG) X brown body Apterous male (EEvgvg)

F1 offspring EeVGvg Brown body color, Wild type wings

As brown body and wild type wings is dominant, the presence of one dominant allele will result in the wild type phenotype.

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