Question

Study the following statements.
(A) A homozygous tall plant is crossed with a homozygous dwarf plant.
(B) A heterozygous tall plant is selfed.
(C) A heterozygous tall plant is crossed with the homozygous dwarf plant.
(D) A heterozygous tall plant is crossed with a homozygous tall plant.

Which of the given percentage of dominant traits matches with the aforementioned statements.

• A. 75% - 25% - 100% - 100%
• B. 100% - 100% - 25% - 75%
• C. 100% - 75% - 50% - 100%
• D. 100% - 50% - 75% - 100%

Answer 1

The correct option is C 100% - 75% - 50% - 100%

The above question can be well explained as given below:

(A)

A homozygous tall (TT) plant is crossed with homozygous dwarf (tt) plant.

TT X tt = Tt and Tt

Both are tall and hence 100%.

(B)

A heterozygous tall (Tt) plant is selfed.

Tt X Tt= TT (tall), Tt (tall), Tt (tall) and tt (dwarf).

Thus, the dominant trait is 75%.

(C)

A heterozygous tall (Tt) plant is crossed with homozygous dwarf (tt) plant

Tt X tt= Tt (tall), Tt (tall), tt (dwarf), tt (dwarf).
Thus, the dominant trait is 50%.

(D)

A heterozygous tall (Tt) plant is crossed with homozygous tall (TT) plant,

Tt X TT= TT (tall), Tt (tall), TT (tall), Tt (tall).

Thus, the dominant trait is 100%.

Thus, the correct answer is option C.