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A tall, heterozygous pea plant is crossed with another tall, heterozygous pea plant. What is the probability that an offspring will be a short plant?(1 point)

Responses

75%
75%

0%
0%

25%
25%

50%

1 answer

To determine the probability of offspring being a short plant when two heterozygous tall pea plants are crossed, we can use a Punnett square.

Let:

  • T = tall allele (dominant)
  • t = short allele (recessive)

Since both parent plants are heterozygous, their genotypes are Tt.

When we cross Tt with Tt, the possible combinations of the offspring are:

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

The combined results give us:

  • TT: 1
  • Tt: 2
  • tt: 1

So the ratios are:

  • Tall (TT or Tt): 3
  • Short (tt): 1

This results in 1 out of 4 offspring being short (tt).

Therefore, the probability of an offspring being a short plant is:

25%