Tall pea plants are dominant over short pea plants. if there are 200 short plants in the f2 generation from a cross that followed mendel’s methods, about how many plants will be tall in that generation? 200 300 600 1,000

There will be 600 tall plants in that generation.

Explanation:

In Mendel’s cross the selected parents are a tall pea plant and a short pea plant. Both the parents are homozygous. The recessive trait is short. Letter T represents tall and t represents short. Hence the phenotype TT is homozygous dominant and tt is homozygous recessive.

The genotype Tt represents tall since T is dominant over t. Mendel’s cross can be represented as

F1 generation      Tt     Tt   Tt   Tt

F2 generation     TT   Tt  Tt  tt

In the F1 generation all the plants are tall and in the F2 generation 3/4 plants are tall and1/4 plants are short.

In the question it is given that 200 plants are short in the F2 generation. Let total number of offspring in the F2 generation is x.

x=800

number of tall plants =

Hence there will be 600 tall plants in the F2 generation.

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