F$_2$ generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of (2012)

(A)co-dominance
(B)dihybrid cross
(C)monohybrid cross with complete dominance
(D)monohybrid cross with incomplete dominance

The NCERT line that answers it

Verbatim line

When the F<sub>1</sub> was self-pollinated the F<sub>2</sub> resulted in the following ratio 1 (**RR**) Red : 2 (**Rr**) Pink : 1 (**rr**) White.

Chapter: Principles of Inheritance and Variation
Section: 4.2.2.1 Incomplete Dominance
Page: 9
Words matched: 27 of 27

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How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly shows a 1:2:1 phenotypic ratio in F2 generation with intermediate phenotype (pink), which is the defining characteristic of incomplete dominance in a monohybrid cross.

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