In Antirrhinum majus, red flower colour (R) is incompletely dominant over white flower colour (r), the heterozygous produces pink flowers. The pink flowers are back crossed to the red parent, what are the possible phenotypes of the offspring?

In Antirrhinum majus, red flower colour (R) is incompletely dominant over white flower colour (r), the heterozygous produces pink flowers. The pink flowers are back crossed to the red parent then we get 50% of the offspring having red flowers and 50% of the offspring having pink flowers.