Question

Tall sunflowers are dominant to short, while yellow colored flowers are dominant to orange. Cross a plant thatis heterozygous for both traits with a plant that is homozygous dominant for height but heterozygous for flowercolor. The unit I’m on is (Dihybrid Crosses). I’m really confuse

Answer 1

Traits of sunflowers

Tall plant: dominant (T)

Short plant: recessive (t)

Yellow-colored flowers: dominant (Y)

Orange-colored flowers: recessive (y)

P1 (heterozygous for both traits)

Tt Yy

P2 (homozygous dominant for height, heterozygous for color)

TT Yy

After the breed, we would have the following offspring:

What this means is that those inside blue (TtYy; 4 individuals (25 % of the offspring) and green (TTYy; 4 individuals (25 % of the offspring)) circles have the respective genotype of their parents, in other words, they inherited their very phenotypical traits, while there're other percentages of the offspring which could have traits of their both parents in its phenotype.