Question

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?



(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%**.