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

(1 point)
Responses

25%
25%

0%
0%

75%
75%

50%

Answer 1

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

The possible gametes from each parent are:

• Heterozygous tall plant (Tt) can produce gametes: T and t
• Homozygous recessive short plant (tt) can produce gametes: t and t

Now, we set up the Punnett square:

\[ \begin{array}{c|c|c} & t & t \ \hline T & Tt & Tt \ \hline t & tt & tt \ \end{array} \]

Now we can analyze the results:

• Tt (tall) offspring: 2
• tt (short) offspring: 2

Thus, the offspring distribution is:

• 50% tall (Tt)
• 50% short (tt)

Therefore, the percentage of offspring expected to be tall is 50%.