A cross was made between homozygous wild-type female Drosophila and yellow-bodied male Drosophila.All of the resulting offspring were phenotypically wild type.Offspring of the F₂ generation had the following phenotypes:
$\begin{array}{lcc}\text { Sex } & \text { Phenotupe } & \text { Number } \\\hline \text { male } & \text { wild } & 96 \\\text { male } & \text { yellow } & 99 \\\text { female } & \text { wild } & 197\end{array}$
Based on this information:
(a)Is the mutant gene for yellow body behaving as a recessive or dominant gene?
(b)Is the yellow locus on an autosome or on the X chromosome?

Question

A cross was made between homozygous wild-type female Drosophila and yellow-bodied male Drosophila.All of the resulting offspring were phenotypically wild type.Offspring of the F₂ generation had the following phenotypes:

\begin{array}{lcc}\text { Sex } & \text { Phenotupe } & \text { Number } \\\hline \text { male } & \text { wild } & 96 \\\text { male } & \text { yellow } & 99 \\\text { female } & \text { wild } & 197\end{array}

Based on this information:
(a)Is the mutant gene for yellow body behaving as a recessive or dominant gene?
(b)Is the yellow locus on an autosome or on the X chromosome?

Quizplus · Accepted Answer

The Answer of A cross was made between homozygous wild-type female Drosophila and yellow-bodied male Drosophila.All of the resulting offspring were phenotypically wild type.Offspring of the F₂ generation had the following phenotypes: $\begin{array}{lcc} \text { Sex } & \text { Phenotupe } & \text { Number } \ \hline \text { male } & \text { wild } & 96 \ \text { male } & \text { yellow } & 99 \ \text { female } & \text { wild } & 197 \end{array}$ Based on this information: (a)Is the mutant gene for yellow body behaving as a recessive or dominant gene? (b)Is the yellow locus on an autosome or on the X chromosome?

A Cross Was Made Between Homozygous Wild-Type Female Drosophila and Yellow-Bodied