Question

Why certain traits though present were not expressed in mendel experiment?

Answer 1

Answer:

By experimenting with pea plant breeding, Mendel developed three principles of inheritance that described the transmission of genetic traits, before anyone knew genes existed. ... This pattern of inheritance, in which the parents do not show the phenotype but some of the children do, is considered recessive.

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Answer 2

Answer:

Mendel and Alleles As there were never any semi-wrinkled seeds or greenish-yellow seeds, for example, in the F2 generation, Mendel concluded that blending should not be the expected outcome of parental trait combinations. Mendel instead hypothesized that each parent contributes some particulate matter to the offspring.