If a tall plant (TT) is crossed with a short plant (tt), what percentage of the offspring will be short?
Use Punnett square.
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From Wendey's head quarters we say it is 50% or "tt".
A Tall Tt is crosssd with a short plant tt
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To determine the percentage of offspring that will be short when a tall plant (TT) is crossed with a short plant (tt), we need to understand the principles of inheritance and the concept of Punnett squares.
In this case, the cross involves a tall plant (TT), which means it has two dominant alleles for height, and a short plant (tt), which means it has two recessive alleles for height.
When these two plants are crossed, each parent contributes one allele for height to their offspring. This results in all the offspring having one dominant allele for tallness (T) and one recessive allele for shortness (t), making them hybrid plants, also known as heterozygous (Tt).
To determine the percentage of short offspring, we need to examine the possible combinations of alleles in the offspring. In this case, there are two possible genotypes - Tt (tall) and tt (short).
Using a Punnett square, we can visualize the possible combinations of alleles:
T t
T TT Tt
t Tt tt
As we can see, there are two possible combinations that result in a short plant (tt). Out of the four possible combinations (TT, Tt, Tt, tt), only one combination (tt) corresponds to a short plant.
Therefore, 1 out of 4 possible combinations results in a short plant. To express this as a percentage, we divide 1 by 4 and multiply by 100:
1/4 * 100 = 25%
So, 25% of the offspring will be short when a tall plant (TT) is crossed with a short plant (tt).