Use the following information to answer the questions below.
Tallness (T) in snapdragons is dominant to dwarfness (t), while red (R) flower color is dominant to white (r). The heterozygous condition results in pink (Rr) flower color.
-A dwarf, red snapdragon is crossed with a plant homozygous for tallness and white flowers. What are the genotype and phenotype of the F₁ individuals?
A) ttRr-dwarf and pink
B) ttrr-dwarf and white
C) TtRr-tall and red
D) TtRr-tall and pink
E) TTRR-tall and red

Question

Quizplus · Accepted Answer

The dwarf, red snapdragon is ttRr (dwarf=t and red=R). The plant homozygous for tallness and white flowers is TTRr (tall=T and white=r). 
The cross can be represented as follows:

T T R r   (gametes from homozygous tall plant)
t R t r    (gametes from dwarf, red plant)
––––––––––––––––––––––
TtRr     (tall and red)
Ttrr      (tall and white)
ttRr      (dwarf and pink)
ttrr       (dwarf and white)

Therefore, the genotype and phenotype of the F1 individuals are TtRr (tall and pink).

Use the Following Information to Answer the Questions Below