Question

The principle of _____ suggests that a plant with the genotype Tt will display a tall phenotype.

Answer 1

THE LAW OF DOMINANCE
When Mendel crossed two true-breeding pea plants that showed one pair of
contrasting traits, only one ofthese traits was evident in the resulting offspring. For
example, ifhe crossed a tall plant and a short plant, all offspring were tall. The trait
that was expressed was described as dominant, while the trait that did not show in
the offspring was recessive. Of the pairs of contrasting traits that Mendel studied, he
found that in each case one trait proved dominant. Tall stems were dominant, short
stems recessive; round seeds were dominant, wrinlded seeds recessive, etc. Mendel
concluded that of every pair of contrasting traits, one is dominant and the other
recessive.
The pure-breeding parent generation is called the F generation. The offspring of
the crosses between members of the P generation are called the first filial, or F1
,
generation. Crosses between members of the F1
generation produce the second filial,
or F2
, generation, and soon. In Mendel’s experiments members of the F1
generation
were hybrids—they were the offspring of unlike parents.