CBSE 2024 · Region 5 · Set 1 · Q30

Mendel crossed pure tall pea plants (TT) with pure short pea plants (tt) and obtained $\displaystyle \mathrm{F}_{1}$ progeny. When the plants of $\displaystyle \mathrm{F}_{1}$ progeny were self-pollinated, plants of $\displaystyle \mathrm{F}_{2}$ progeny were obtained.

(a)

What did the plants of $\displaystyle \mathrm{F}_{1}$ progeny look like ? Give their gene combination.

(b)

Why could the gene for shortness not be expressed in plants of $\displaystyle \mathrm{F}_{1}$ progeny?

(c)

Write the ratio of the plants obtained in $\displaystyle \mathrm{F}_{2}$ progeny and state the conclusion that can be drawn from this experiment.