Question

(ntse exam question) If, in a plant, red colour of the flower is dominant over white. A cross was made between a plant containing red flower and other with white flower. The cross yielded 50% white flowered plant and 50% red flowered plant. The genotype of the parent with red flower is: (1) Homozygous (2) Heterozygous (3) Cannot be determined (4) Can be homozygous or heterozygous

Answer 1

The genotype of the parent with red flower was heterozygous.
Otherwise, no white flower would have produced.

Answer 2

The answer is, (2) Heterozygous.   :).