In Drosophila melanogaster round eyes rai are dominant to ra

In Drosophila melanogaster, round eyes (rai^+) are dominant to raisin eyes (rai). Round eyes are found in wild-type flies, while raisin eyes are the result of a mutant allele. If a heterozygous parent is crossed with a homozygous recessive parent, then what are the correct phenotypic ratios for the F1 progeny? 4:0, round eyes. 3:1, raisin eyes:round eyes 1:1, round eyes:raisin eyes 4:0, raisin eyes

Solution

Answer: (c) 1:1, round eyes:raisin eyes

Round eyes = rai⁺ (dominant), raisin eyes = rai (recessive)

Cross: rai⁺ rai * rai rai

Progeny: rai⁺ rai (Round) : rai rai (Raisin) = 1:1