Question

28. A pure-breeding violet-flowered pea plant is crossed
with another pure-breeding white-flowered pea plant.
The F, progeny plants are self-pollinated to raise F,
progeny plants.
(a) What will be the colour of flowers in the F,
progeny plants?
(6) State the ratio of violet-flowered plants to
white-flowered plants.
(c) Name the type of plant not found in F,
generation, but in F, progeny plants. Give a
reason for this observation.
(d) What does it indicate about the inheritance of
these two forms of the trait?​

Answer 1

a) All the flowers in F1 generation will be violet since only dominant trait is expressed in F1 generation.

b) In F1 the ratio is 4:0 while in F2 it's 3:1

c) White flowers are not found in F1 but not in F2 as only dominant trait is expressed in F1 while the recessive trait is expressed in F2 in the ratio of 3:1 in accordance to Mendel's law of dominance as white flower colour is a recessive trait.

d) It indicates complete dominance.