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Question

F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratio are same as 1 : 2 : 1. It represents a case of

A
Monohybrid cross with complete dominance
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B
Monohybrid cross with incomplete dominance
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C
Co-dominance
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D
Dihybrid cross
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Solution

The correct option is B Monohybrid cross with incomplete dominance
Incomplete dominance is a type of intermediate inheritance in which one allele is not completely dominant over its paired allele. In this, the third phenotype is observed in heterozygous condition. In monohybrid cross with incomplete dominance, the phenotypic and genotypic ratio is 1:2:1, where one part is with dominant phenotype, 2 parts are with intermediate phenotype and 1 part is with recessive phenotype. For example, a snapdragon flower shows red (dominant), white (recessive) and pink (intermediate) flowers.
Thus, the correct answer is 'Monohybrid cross with incomplete dominance.'

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