In Mendel's experiment, when F1 generation plants were self-pollinated, what was the genotypic ratio?

Question

Question

This question was previously asked in

RRB Group D 2 Sept 2022 Shift 1 Official Paper

Answer 1

The correct answer is Option 2.
Key Points

In Mendel's experiment, The F1 generation results from the cross-pollination of two-parent (P) plants and contains all purple flowers. The F2 generation results from the Self-pollination of F1 plants and contains 75% purple flowers and 25% white flowers. (PHENOTYPE).
The GENOTYPE was 25% pure purple flower, 50% hybrid purple flower, and 25% pure white flower.
Through this experiment, Mendel has concluded the Law of Segregation,
"During the formation of gamete, each gene separates from each other so that each gamete carries only one allele for each gene."

Explanation-
PHENOTYPIC RATIO - 3:1
GENOTYPIC RATIO - 1:2:1

Additional Information

On the basis of his experiments, Mendel has given three laws of Inheritance -
Law of Dominance, Law of Segregation, Law of Independent Assortment.
Mendel has selected 7 pairs of opposite characteristics of the Pea plant.
The law of dominance is known as the First law of Inheritance.
In this law, each character is controlled by distinct units called factors (which are later known as Genes ), which occur in pairs.
If the pairs are heterozygous, one will always dominate the other.
The Law of Independent Assortment states that Alleles for separate traits are passed independently of one another.