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 tall 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 tall plant is 50%.

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

If a heterozygous tall plant (Tt) is crossed with a homozygous short plant (tt), what is the probability of obtaining a tall 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: Write down the possible gametes (sperm or egg cells) each parent can produce. The Tt parent can produce gametes T and t. The tt parent can only produce gametes t.
Step 3: Set up a Punnett square to visualize the cross. Place the gametes from the Tt parent on the top and the gametes from the tt parent on the side.
Step 4: Fill in the Punnett square by combining the gametes. The combinations will be: Tt (tall) and tt (short).
Step 5: Count the results in the Punnett square. There are 2 squares: one Tt (tall) and one tt (short).
Step 6: Calculate the probability of obtaining a tall plant. There is 1 tall plant (Tt) out of 2 total plants, which is 1 out of 2 or 50%.

Mendelian Genetics – Understanding the inheritance patterns of dominant and recessive traits through Punnett squares.