In pea plants, the allele for tall (T) is dominant to the allele for short (t). Which of the following is the percent of offspring that will be tall if a heter
In pea plants, the allele for tall (T) is dominant to the allele for short (t). Which of the following is the percent of offspring that will be tall if a heterozygous plant (Tt) is crossed with a homozygous tall plant?
A. 100%<~~~ I think it's A
B. 75%
c. 50%
D. 25%
All the gametes from homozygous tall plants would be T and then from heterozygous plant would be T and t. If you make a punnett square then you will see that 100% of progeny is tall due to Tt genotype (50%) and TT genotype (50%) since T is dominant to t.
To determine the percent of offspring that will be tall in the given scenario, you can use a Punnett square to analyze the possible combinations of alleles.
A heterozygous plant (Tt) has one allele for tall (T) and one allele for short (t), while a homozygous tall plant would have two alleles for tall (TT).
Arranging the alleles in a Punnett square, you would have:
| T | t
----------------
T | TT | Tt
----------------
T | TT | Tt
From the Punnett square, you can see that there are four possible combinations of alleles for the offspring: TT, Tt, TT, Tt. Among these, three combinations include the allele for tall (T) and only one combination includes the allele for short (t).
Thus, the percent of offspring that will be tall is 3 out of 4, which is 75%.
Therefore, the correct answer is B. 75%.