Incomplete dominance is shown by

Which of the following phenomena is observed in the plant $Mirabilis \text{ } jalapa$?

In $Mirabilis$ $jalapa$,when a homozygous red-flowered plant is crossed with a white-flowered plant,all $F_1$ plants produce pink flowers. When $F_1$ plants are self-pollinated,the resulting $F_2$ generation produces red,pink,and white flowers in the ratio of:

$A$ grey-feathered chicken is crossed with another chicken of the same phenotype. The offspring are $15$ grey,$6$ black,and $8$ white. What will be the phenotype of the offspring produced by selfing the grey chickens and the black chickens from their progeny?

When two homozygous plants with red and white flowers are crossed, their offsprings show pink flowers. This indicates that the alleles of the gene for flower colour shows . . . . . . .

$A$ plant with red flowers was crossed with another plant with yellow flowers. If $F_1$ showed all flowers orange in colour,explain the inheritance.