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Which trait—white or purple flowers—is controlled by a dominant allele?

Use the following Punnett square to answer the question:

\[
\begin{array}{c|c|c}
& W & W \\
\hline
W & WW & WW \\
\hline
w & Ww & Ww \\
\end{array}
\]

- \(W\) represents white flowers
- \(w\) represents purple flowers

Answer :

White flowers are controlled by a dominant allele.

In the Punnett square provided, the presence of at least one "W" allele results in white flowers, while the presence of two "w" alleles results in purple flowers.

Since the "W" allele is dominant and masks the expression of the "w" allele in the heterozygous condition (Ww), white flowers are controlled by a dominant allele.

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