Which of the following statements about Mendel's breeding experiments is correct?
a. None of the parental (P) plants were true-breeding.
b. All of the F2 progeny showed a phenotype that was intermediate between the two parental (P) phenotypes.
c. Half of the F1 progeny had the same phenotype as one of the parental (P) plants, and the other half had the same phenotype as the other parent.
d. All of the F1 progeny resembled one of the parental (P) plants, but only some of the F2 progeny did.
e. none of the above.
D is correct
F1 had all purple phenotypes
and F2 had 3 to 1 ratio purple/ white
e. none of the above.
That's the thing about Mendel's experiments, they were full of surprises! None of those statements are correct. Mendel found that the parental plants were true-breeding, meaning they consistently produced offspring with the same traits. The F2 progeny didn't show an intermediate phenotype, but rather a 3:1 ratio of dominant to recessive traits. And the F1 progeny all resembled one of the parental plants, not half-and-half. So, none of those statements are true, but hey, at least we can learn from Mendel's garden adventures, right?
The correct statement about Mendel's breeding experiments is:
c. Half of the F1 progeny had the same phenotype as one of the parental (P) plants, and the other half had the same phenotype as the other parent.
To determine which statement about Mendel's breeding experiments is correct, let's analyze each option:
a. None of the parental (P) plants were true-breeding.
To verify this statement, we need to understand the concept of true-breeding. True-breeding plants are those that, when self-fertilized or crossed with another true-breeding plant, consistently produce offspring with the same traits as the parent. In Mendel's experiments, he specifically used true-breeding plants for his parental generation to establish a baseline for his observations. Therefore, option a is not correct.
b. All of the F2 progeny showed a phenotype that was intermediate between the two parental (P) phenotypes.
To evaluate this statement, we must consider the concept of phenotypes. Phenotype refers to the set of observable characteristics of an organism resulting from a combination of genetic and environmental factors. In Mendel's experiments, he observed traits that exhibited a dominant and recessive relationship. When two plants with different phenotypes were crossed (P-generation), the F1 generation showed only the dominant trait. However, in the F2 generation, the recessive trait reappeared. Therefore, option b is not correct as the F2 progeny did not show an intermediate phenotype, but rather a mix of the two parental phenotypes.
c. Half of the F1 progeny had the same phenotype as one of the parental (P) plants, and the other half had the same phenotype as the other parent.
This statement accurately reflects Mendel's observations. In his experiments, when crossing plants with different phenotypes, the F1 generation consistently displayed the same phenotype as one of the parents. For example, if a tall and short plant were crossed, all the F1 plants would be tall. Therefore, option c is correct.
d. All of the F1 progeny resembled one of the parental (P) plants, but only some of the F2 progeny did.
This statement is incorrect according to Mendel's observations. In his experiments, all the F1 progeny resembled one of the parental plants, but in the F2 generation, both parental traits reappeared, although in a specific ratio dictated by Mendel's laws of inheritance. Therefore, option d is not correct.
e. none of the above.
Since option c is correct, we cannot select "none of the above" as the correct answer.
Therefore, the correct statement about Mendel's breeding experiments is:
c. Half of the F1 progeny had the same phenotype as one of the parental (P) plants, and the other half had the same phenotype as the other parent.