In pea plants, tall plants (T) are dominant over short plants (t). If a heterozygous tall pea plant is crossed with a homozygous recessive short pea plant, what percentage of the offspring is expected to be tall.

Question

(HINT: use a Punnett square to help you with this question)

(1 point)
Responses

0%
0%

75%
75%

50%
50%

25%

Answer 1

To determine the expected percentage of tall offspring from the cross between a heterozygous tall pea plant (Tt) and a homozygous recessive short pea plant (tt), we can use a Punnett square.

The alleles are as follows:

• T (tall) - dominant
• t (short) - recessive

The parents in this cross are:

• Parent 1 (heterozygous): Tt
• Parent 2 (homozygous recessive): tt

Now, we can set up the Punnett square:

          T       t
        ----------------
     t |    Tt   |   tt   |
        ----------------
     t |    Tt   |   tt   |
        ----------------

From the Punnett square, we can see the potential genotypes of the offspring:

• 50% Tt (tall)
• 50% tt (short)

Based on this, we can conclude that 50% of the offspring are expected to be tall.

Therefore, the answer is 50%.