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

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Question: If a heterozygous tall plant (Tt) is crossed with a homozygous short plant (tt), what is the probability of obtaining a short plant?

Options:

Correct Answer: 50%

Solution:

The cross Tt x tt results in 50% Tt (tall) and 50% tt (short), so the probability of obtaining a short plant is 50%.

If a heterozygous tall plant (Tt) is crossed with a homozygous short plant (tt), what is the probability of obtaining a short plant?

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%.

Mendelian Genetics – Understanding the inheritance patterns of dominant and recessive traits through Punnett squares.
Genotype and Phenotype – Differentiating between the genetic makeup (genotype) and the observable characteristics (phenotype) of organisms.