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(D) $1$. In the given table, the gene $B$ affects two different phenotypic traits: starch grain size and seed shape. This phenomenon, where a single g

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Gene shows co-dominance

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(D) $1$. In the given table, the gene $B$ affects two different phenotypic traits: starch grain size and seed shape. This phenomenon, where a single gene influences multiple phenotypic traits, is known as pleiotropy.$2$. For starch grain size, the heterozygote $(Bb)$ shows an intermediate phenotype between the dominant $(BB)$ and recessive $(bb)$ homozygotes. This is a classic example of incomplete dominance.$3$. For seed shape, the heterozygote $(Bb)$ shows the same phenotype (Round) as the dominant homozygote $(BB)$. This indicates a normal dominant-recessive relationship.$4$. Co-dominance occurs when both alleles are expressed equally in the heterozygote (e.g., $AB$ blood group). In this case, the intermediate size is a blend, not the expression of both traits simultaneously, so it is not co-dominance.$5$. Therefore, the statement that the gene shows co-dominance is incorrect.

Genotype	Starch grain size and Seed shape
$BB$	Large,Round
$Bb$	Intermediate,Round
$bb$	Small,Wrinkled

Observe the phenotypic effects of a gene with $2$ alleles $B$ and $b$ in pea plant.
Genotype Starch grain size and Seed shape
$BB$ Large,Round
$Bb$ Intermediate,Round
$bb$ Small,Wrinkled

Which of the following is incorrect in concern to above facts $:-$

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Observe the phenotypic effects of a gene with $2$ alleles $B$ and $b$ in pea plant.GenotypeStarch grain size and Seed shape$BB$Large,Round$Bb$Intermediate,Round$bb$Small,WrinkledWhich of the following is incorrect in concern to above facts $:-$