Question

In a monohybrid cross, if the gene for tall (T) plants was incompletely dominant over the gene for short (t) plants, what would be the predicted result of crossing an intermediate (Tt) plant with a tall (TT) plant? (Hint: You may want to complete a Punnett square) (2 points)

Answer 1

Answer:

50% tall plants and 50% short plants

Explanation:

T T

T TT TT

t Tt Tt

Answer 2

Answer: Crossing an intermediate (Tt) plant with a tall (TT) plant will result in four offsprings: 2 TT and 2 Tt.

Explanation: A cross between an intermediate plant (Tt) and a tall plant (TT) will produce two tall plants (TT) and two intermediate plants (Tt).

From the information provided above, gene for tall plants (T) is incompletely dominant over the gene for short plants (t), therefore plants with genotype (Tt) will manifest as intermediates (not tall but not short), while plants with genotype TT will manifest as tall plants.

See the attached punnet square for more information