Question

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

Answer 1

There are 600 tall plants in Filial Generation 2

Given,

There are 200 short plants

According to Mendelian Genetics,

A trait suppressed in the F1 generation (recessive trait) has a probability to appear in 1/4th of the Total Population in the F2 generation

Let us assume the total number of plants is x

$\implies \: \tt \: \: \dfrac{x}{4} = 200 \\ \\ \implies \: \tt \: x = 800 \: \: plants$

• The total number of plants are 800

If 1/4th of the total population are short plants,3/4th of the total population would be tall plants

Let there be y number of tall plants

Thus,

$\implies \tt \: \dfrac{3}{4} \times 800 =y \\ \\ \implies \: \tt \: y = 3 \times 200 \\ \\ \implies \: \tt \: y = 600 \: \: plants$

• Total number of tall plants are 600

Option (C) 600 is correct