Question

Given below are two statements, one is labelled as Statement (1) and other one labelled as Statement (2).
Statement (1): The flower colour in the sweet pea, are either purple or white. The \(F_1\) hybrids were all purple. When these hybrids were intercrossed, a ratio of 9 purple: 7 white plants were obtained in the \(F_2\).
Statement (2): Two independently assorting genes, C and P, are involved in anthocyanin synthesis and that each gene has a recessive allele that abolishes pigment production.
In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statements are correct.
• B. Statement (1) is correct but Statement (2) is incorrect.
• C. Statement (1) is incorrect but Statement (2) is correct.
• D. Both Statements are incorrect.

Hint:

The standard dihybrid ratio is \(9:3:3:1\).
Whenever you see a modified dihybrid ratio like \(9:7\), think of complementary gene action where homozygous recessive alleles at either locus mask the dominant phenotype.

Answer 1

The Correct Option is A