Describe incomplete dominance.  

Vedclass pdf generator app on play store
Vedclass iOS app on app store

When experiments on peas were repeated using other traits in other plants it was found that sometimes the $F_{1}$ had a phenotype that did not resemble either of the two parents and was in between the two.

The inheritance of flower colour in the dog flower (Snapdragon or Antirrhinum sp.) is a good example to understand incomplete dominance.

In a cross between true - breeding red flowered [$RR$] and true - breeding white flowered plants ( $rr$) the $F_{1}[R r]$ was pink.

When the $\mathrm{F}_{1}$ was self pollinated the $\mathrm{F}_{2}$ resulted in the following ratio $1$ [ $RR $] Red : $2[\mathrm{Rr}]$ Pink : $1[\mathrm{rr}]$ White.

Here the genotype ratios were exactly as we would expect in any mendelian monohybrid cross, but the phenotype ratio had changed from the $3: 1$ dominant : recessive ratio.

$'R'$ was not completely dominant over $r$ and this made it possible to distinguish $\mathrm{Rr}$ as pink from $RR$ [red] and $rr$ [white].

967-s28

Similar Questions

A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?

  • [NEET 2024]

In poultry, new comb colour appears by colaboration of two dominant gene is

Geno typic and phenotypic ration in the offspring is $1:2:1$ it explain the principle of

Incomplete dominance is found in

In case of incomplete dominance in $F_2$ generation