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 tall plant?
0%
25%
50%
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 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%.
