Respuesta :
Gregor Mendel’s observation that both tall and short pea plants are sometimes observed when crossing two tall pea plants can be explained by the concept of trait dominance. This concept states that certain traits can be either dominant or recessive.
A dominant trait is one that will always be expressed when present, while a recessive trait is one that will only be expressed when both alleles (genes) are the same. In Mendel’s case, the tall trait is dominant, while the short trait is recessive. This means that when two tall pea plants are crossed, some of the resulting progeny will be tall, while others will be short. The tall trait will be expressed in the progeny due to its dominance, while the short trait will be expressed only when both alleles are the same.
Mendel’s observation is further understood when looking at the genetic makeup of the parents. When two tall pea plants are crossed, each parent has two alleles for the tall trait, one dominant and one recessive. When these two alleles are combined in the progeny, some of the progeny will receive two dominant alleles, which will result in a tall plant, while others will receive one dominant and one recessive allele, which will result in a short plant.
Learn more about trait dominance at :https://brainly.com/question/20744588
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