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Get Answers to all your Questions
(a) Why is the progeny always of tall plants when a tall pea plant is crossed with a short pea plant?
(b) How is progeny obtained by self-pollination of F1 progeny different from
progeny ? Give reason for this observation.
(c) State a conclusion that can be drawn on the basis of this observation.
Answers (1)
a) The cross between tall and short pea plant produces the tall progeny. The tall progeny is present in heterozygous condition and the tall trait is dominant that expresses itself and suppresses the expression of the short trait.
b) In the F2 progeny, one-quarter of the plants are short and rest are tall. It has 1:2:1 ratio of TT, Tt And tt trait combinations.
c) From these observations we conclude that in f1 generation all plants are tall but in f2 generation, one-third of the progeny will be tall and rest will be short, as the phenotypic ratio of the tall and short plant will be 3:1.
