If a heterozygous tall plant (Tt) is crossed with a homozygous short plant (tt),

Practice Questions

Q1
If a heterozygous tall plant (Tt) is crossed with a homozygous short plant (tt), what is the probability of obtaining a short plant?
  1. 0%
  2. 25%
  3. 50%
  4. 75%

Questions & Step-by-Step Solutions

If a heterozygous tall plant (Tt) is crossed with a homozygous short plant (tt), what is the probability of obtaining a short plant?
  • Step 1: Identify the genotypes of the parent plants. One parent is heterozygous tall (Tt) and the other is homozygous short (tt).
  • Step 2: Set up a Punnett square to visualize the possible combinations of alleles from the parents.
  • Step 3: Write the alleles of the first parent (Tt) on the top of the Punnett square: T and t.
  • Step 4: Write the alleles of the second parent (tt) on the side of the Punnett square: t and t.
  • Step 5: Fill in the Punnett square by combining the alleles from the top and side.
  • Step 6: The combinations in the Punnett square will be: Tt (tall) and tt (short).
  • Step 7: Count the results: 1 Tt (tall) and 1 tt (short).
  • Step 8: Calculate the probability of obtaining a short plant (tt). There is 1 short plant out of 2 total plants.
  • Step 9: Therefore, the probability of obtaining a short plant is 1 out of 2, which is 50%.
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