The f1 generation plants is hybrid and looks similar to the parent plant so phenotype is the same, but the genotype of that plant will be different as it is hybrid of two parents. Yes , the tall plants are exactly the same in appearence as the plants in the parent generation.

Tall Plants of the F1 Generation in Mendel's Experiment

In Mendel's experiment on inheritance, he conducted a series of crosses between tall and dwarf pea plants to study the transmission of traits from one generation to the next. Through his experiments, he discovered that certain traits are passed down from parents to offspring in a predictable manner, laid the foundation for the understanding of inheritance, and is commonly known as the Father of Genetics.

The Parent Generation:
Mendel started his experiments by crossing purebred tall plants (TT) with purebred dwarf plants (tt). The purebred plants are homozygous for a particular trait, meaning they only carry the alleles for tallness (T) or dwarfness (t). In this case, the tall plants have two dominant alleles (TT) for the tall trait, while the dwarf plants have two recessive alleles (tt) for the dwarf trait.

The F1 Generation:
The offspring resulting from the cross between the tall and dwarf plants are referred to as the first filial generation or F1 generation. Mendel observed that all the plants in the F1 generation were tall. This was a significant finding because it contradicted the blending inheritance theory that was commonly accepted at the time.

Explanation:
Mendel's experiments revealed that the F1 generation plants were exactly the same as the tall plants in the parent generation. This observation can be explained by the principles of Mendelian genetics.

1. Dominant Trait: The trait for tallness (T) is dominant over the trait for dwarfness (t). This means that when a tall plant (TT) is crossed with a dwarf plant (tt), the offspring will inherit one allele for tallness from the tall parent.

2. Law of Segregation: According to Mendel's law of segregation, each parent contributes one allele to their offspring. In the F1 generation, all the plants received one allele for tallness (T) from the tall parent, resulting in the expression of the dominant trait.

3. Genotype and Phenotype: The genotype of the F1 plants is heterozygous (Tt) because they inherited one allele for tallness (T) and one allele for dwarfness (t). However, the phenotype (physical appearance) of the F1 plants is tall because the dominant allele (T) masks the expression of the recessive allele (t).

4. No Blending Inheritance: The fact that all the F1 plants were tall, despite one parent being a dwarf, refuted the idea of blending inheritance. Instead, Mendel's experiments showed that traits are inherited discretely and can be passed down without blending.

In summary, the tall plants of the F1 generation in Mendel's experiment were exactly the same as the tall plants of the parent generation because the allele for tallness (T) is dominant over the allele for dwarfness (t), and the F1 plants inherited one allele for tallness from the tall parent. This resulted in the expression of the tall phenotype in all the F1 plants.