Traits that were masked in the F1 generation reappeared in the F2 generation due to Mendel's law of segregation. During gamete formation, alleles segregate randomly so that each gamete carries only one allele for each trait. When F1 hybrids are crossed, the recessive allele can be passed down and result in the expression of the trait in the F2 generation.
F2 generation
F1 generation
The original generation for pea plants in Mendel's experiment is called the P generation, or parental generation. This generation consisted of the true-breeding plants that Mendel used to establish the traits he studied. The P generation was crossed to produce the F1 generation, which exhibited the traits inherited from the P generation.
Gregor Mendel called the traits that disappear in the first generation recessive traits. These traits are not expressed in the offspring when there is a dominant trait present.
In Mendel's experiments, the recessive traits were observed in the F2 generation. Initially, the traits were not visible in the F1 generation, where only the dominant traits were expressed. However, when the F1 plants were allowed to self-pollinate, the recessive traits reappeared in the F2 generation, typically in a ratio of about 3:1, dominant to recessive.
the traits were recessive
F2 generation
f2 generation
F1 generation
F1 generation
f2 generation
The original generation for pea plants in Mendel's experiment is called the P generation, or parental generation. This generation consisted of the true-breeding plants that Mendel used to establish the traits he studied. The P generation was crossed to produce the F1 generation, which exhibited the traits inherited from the P generation.
In Mendel's first experiment with pea plants, he crossed true-breeding plants with contrasting traits (e.g., tall and short). He found that the first generation (F1) offspring all displayed one of the traits, while the second generation (F2) showed a 3:1 ratio of the dominant to recessive trait. This led him to formulate his principles of inheritance, now known as Mendelian genetics.
P1 or parental
Gregor Mendel called the traits that disappear in the first generation recessive traits. These traits are not expressed in the offspring when there is a dominant trait present.
In Mendel's experiments, the recessive traits were observed in the F2 generation. Initially, the traits were not visible in the F1 generation, where only the dominant traits were expressed. However, when the F1 plants were allowed to self-pollinate, the recessive traits reappeared in the F2 generation, typically in a ratio of about 3:1, dominant to recessive.
All of the F1 generation are heterozygous, therefore 100% exhibit the dominant phenotype. The F2 generation has a ratio of 1 homozygous dominant: 2 heterozygous: 1 homozygous recessive. This results in a phenotypic ratio of 3 dominant: 1 recessive.