Question

if we pure bred (dominant) tall pea plant with pure bred dwarf (recessive) pea plant we will get plants of f1 generation if we now self cross the pea plant of f2 genaration. a) what do the plants of f2genaration look like? b) state the ratio of tall plant to dwarf plant in f2 generation c) state the type of plant not found in f1 generation but appeared in f2 generation mentioning the reason for the same

Answer 1

1) The f2 gen will have three tall plants and 1 short plant
2) 3:1
3) no short plant was found in the f1 generation as in f1 gen, the cross between two homozygous plants which resulted in the expression of only the dominant trait whereas the recessive trait got suppressed. If f2 gen, due to the law of segregation the recessive trait got expressed In the presence of another recessive trait (homozygous -tt)

Hope it helps ya

Answer 2

1) In F2 generation there would be 3 tall and 1 short out of which 2 would be hybrid tall (Tt) , one would be pure tall (TT) and one would be a pure dwarf (tt).
2) tall plants- 3
Short plant -1
Ratio of tall is to short 3:1
3) the dwarf plant did not appear in the F1 generation because of the law of dominance where only 1 character of a dominant trait is enough for it to be represented in the progeny whereas to represent a recessive trait two characters would be required.