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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? (HINT: set up a Punnett Square).(1 point) Responses 0% 0% 25% 25% 50% 50% 75%

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To determine the percentage of tall offspring from the cross of a heterozygous tall pea plant (Tt) with a homozygous recessive short pea plant (tt), we can set up a Punnett Square.

  1. The alleles of the heterozygous tall plant (Tt) are T and t.
  2. The alleles of the homozygous recessive short plant (tt) are t and t.

The Punnett Square will look like this:

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

From this Punnett Square, we can see the possible genotypes of the offspring:

  • Tt (tall) — 2 squares
  • tt (short) — 2 squares

So, out of 4 total offspring:

  • 2 will be tall (Tt)
  • 2 will be short (tt)

To calculate the percentage of tall offspring:

  • Number of tall offspring = 2
  • Total number of offspring = 4

Percentage of tall offspring = (Number of tall offspring / Total number of offspring) * 100 = (2/4) * 100 = 50%

Thus, the expected percentage of tall offspring is 50%.