Use the following information to answer the question.
$$\begin{array} { c c c }
\text { Sex } & \text { Phenotype } & \text { Number } \
\text { male } & \text { wild } & 123 \
\text { male } & \text { yellow } & 116 \
\text { female } & \text { wild } & 240
\end{array}$$
In a Drosophila experiment, a cross was made between homozygous wild-type females and yellow-bodied males. All of the resulting F?s were phenotypically wild type. However, adult flies of the F? generation (resulting from matings of the F?s)had the characteristics shown in the figure. How is the mutant allele for yellow body inherited?
A) It is recessive.
B) It is codominant.
C) It is dominant.
D) It is incompletely dominant.

Question

Use the following information to answer the question.
$$\begin{array} { c c c } 
\text { Sex } & \text { Phenotype } & \text { Number } \
\text { male } & \text { wild } & 123 \
\text { male } & \text { yellow } & 116 \
\text { female } & \text { wild } & 240
\end{array}$$
In a Drosophila experiment, a cross was made between homozygous wild-type females and yellow-bodied males. All of the resulting F?s were phenotypically wild type. However, adult flies of the F? generation (resulting from matings of the F?s)had the characteristics shown in the figure. How is the mutant allele for yellow body inherited?
A) It is recessive.
B) It is codominant.
C) It is dominant.
D) It is incompletely dominant.

Quizplus · Accepted Answer

The yellow body allele is recessive because the F1 generation, resulting from a cross between homozygous wild-type females and yellow-bodied males, were all phenotypically wild type, indicating that the wild-type allele is dominant over the yellow body allele.

Use the Following Information to Answer the Question In a Drosophila Experiment, a Cross Was Made Between Homozygous