RR(red) is crossed with rr (white). All Rr offsprings are pink. This indicates that R gene is
A
Hybrid
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B
Incompletely dominant
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C
Recessive
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D
Mutant
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Solution
The correct option is B Incompletely dominant Incomplete dominance refers to a genetic situation in which one allele does not completely dominate another allele and, therefore, results in a new phenotype. It shows that the dominant allele is incompletely dominant. Examples of incomplete dominance are:
1. A snapdragon flower that is pink as a result of cross-pollination between a red flower and a white flower when neither the white or the red alleles are dominant. 2. A brown fur coat on a rabbit as a result of one rabbit's red allele and one rabbit's white allele not dominating.