Question

AMendelian experiment consisted of breeding tall pea plants bearingviolet flowers with short pea plants bearing white flowers. Theprogeny all bore violet flowers, but almost half of them were short.This suggests that the genetic make-up of the tall parent can bedepicted as

(a) TTWW

(b) TTww

(c) TtWW

(d) TtWw

Answer 1

(c) Thegenetic make-up of the tall parent can be depicted as TtWW

Since allthe progeny bore violet flowers, it means that the tall plant havingviolet flowers has WW genotype for violet flower colour.

Since theprogeny is both tall and short, the parent plant was not a pure tallplant. Its genotype must be Tt.

Therefore,the cross involved in the given question is

TtWw	×	ttww
	↓
TtWw	−	ttww

Therefore,half the progeny is tall, but all of them have violet flowers.