A tall, heterozygous pea plant (Tt) is crossed with another tall, heterozygous pea plant. Use a Punnett square to determine the probability that the offspring is a short, homozygous pea plant (tt).(1 point)

Question

Responses

75%
75%

50%
50%

25%
25%

0%

Answer 1

To determine the probability of obtaining a short, homozygous pea plant (tt) from a cross between two heterozygous tall plants (Tt), we can use a Punnett square.

1. Set up the Punnett square:

   • The alleles from the first parent (Tt) can produce gametes: T or t
   • The alleles from the second parent (Tt) can also produce gametes: T or t

2. Fill out the Punnett square:

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

3. Analyze the results:

   • TT (homozygous tall)
   • Tt (heterozygous tall)
   • Tt (heterozygous tall)
   • tt (homozygous short)

4. Count the offspring types:

   • There are 1 TT, 2 Tt, and 1 tt.

5. Probability Calculation:

   • The probability of getting a tt offspring is 1 out of 4, or 25%.

Therefore, the probability that the offspring is a short, homozygous pea plant (tt) is 25%.