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In Drosophila melanogaster (the common fruit fly), the allele for long, normal wings is dominant over...

In Drosophila melanogaster (the common fruit fly), the allele for long, normal wings is dominant over a recessive allele for short, stubby wings called wingless. What are the expected genotypic and phenotypic ratios expected for the F1 generation for the following cross? Homozygous Long Wings X Heterozygous

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Answer #1

Please look in the image for solution:

The long wing wing is encoded by L which is dominant over l allele.

The long leg is encoded by dominant allele L. And it is dominant over l allele.

parents genotype are: LL ( homozygous long) × Ll ( heterozygous)

Punnet square:

Gametes L l
L LL ( long leg) Ll ( long leg)

Phenotypic ratio: Long leg (1) : short leg (0) or 1

Genotypic ratio: LL (1) : Ll (1) or 1:1

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