In the night beauty, red flowers are inherited dominantly over white. from crossing plants with

In the night beauty, red flowers are inherited dominantly over white. from crossing plants with red flowers and plants with white flowers, received plants of the first generation with orange flowers, determine the genotype of parents and offspring

Let’s designate the gene that determines the red color of the flowers of the night beauty as C, then the gene that determines the white color of her flowers will be designated as c.

Since hybrids of a night beauty with orange flowers were obtained from crossing plants with red and white flowers, it should be concluded that there is a phenomenon of incomplete dominance in the inheritance of the color of the flowers of this plant: heterozygotes exhibit a new, usually intermediate in value, trait.

Thus, plants with orange flowers will be recorded as Cc.

Night beauty with red flowers – СС, with white flowers – cc.

Answer: parent plants: with red flowers – homozygotes for the dominant trait (CC), with white flowers – homozygotes for the recessive trait (cc); all plants obtained in F1 and having orange flowers are heterozygotes (Cc).