Describe how Mendel showed that the green-seed trait did not disappear but was only masked.

Mendel showed that the green-seed trait did not disappear but was only masked by breeding plants with only two alleles for the trait. After the cross of yellow seed, a small amount of offspring had green seeds. So, he concluded that the green-seed trait is masked by the dominant yellow-seed trait and that two alleles are necessary for green-seed trait to show up.

Answered by W0lf93 | 2024-06-24

Mendel crossed yellow-seeded with green-seeded pea plants, observing yellow in F1 and green reappearing in F2, demonstrating trait masking.
Gregor Mendel demonstrated the concept of trait masking through his experiments with pea plants. In one of his classic experiments, Mendel crossed purebred, yellow-seeded pea plants (genotype YY) with purebred, green-seeded pea plants (genotype yy).
The resulting first-generation (F1) plants all had yellow seeds. This led Mendel to conclude that the yellow trait was dominant over the green trait.
However, when he allowed the F1 plants to self-pollinate and produce a second generation (F2), he observed that the green-seeded trait reappeared in approximately one-quarter of the offspring. This indicated that the green trait had not disappeared but was only masked in the first generation.
Mendel's explanation came from understanding the principles of segregation and independent assortment. In the F1 generation, the yellow trait masked the expression of the green trait because it was dominant.
However, in the F2 generation, the alleles segregated independently, allowing the recessive green trait to reappear in some offspring. This phenomenon illustrated Mendel's laws of inheritance, particularly the concept of dominant and recessive traits, and laid the foundation for modern genetics.

Answered by shivani00ira | 2024-06-25

Mendel demonstrated that the green-seed trait did not disappear but was masked by the dominant yellow-seed trait through a series of cross-breeding experiments with pea plants. His findings revealed that the recessive green trait reappeared in the second generation in a 3:1 ratio when yellow and green plants were crossed. This established the principles of dominant and recessive traits in inheritance.
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Answered by W0lf93 | 2024-12-24