In a dihybrid cross of two tall pea plants with yellow pods

In a dihybrid cross of two tall pea plants with yellow pods that are heteroaygous for both traits (Tyy), what is the probability of getting a dwart plant or a plant with green pods? Express your answer as a reduced fraction such as 5/16

Solution

TtYy (Tall yellow) x TtYy (Tall yellow)

Dwarf plant= ttYY, ttYy

Probabilities of the ttYY combination is =¼ x ¼ =1/16

Probabilities of the ttYy combination is =¼ x 1/2 =

Total probability = 1/16 + = 3/16

Probability of dwarf plant is 3/16

Green pod= TTyy, Ttyy

Probabilities of the TTyy combination is =¼ x ¼ =1/16

Probabilities of the Ttyy combination is =1/2 x 1/4 =

Total probability = 1/16 + = 3/16

Probability of green pod plant is 3/16