//M0//QN1//CS//DL0
Mendel worked on pea plant (1856-1863) and selected 14 true-breeding pea (Pisum sativum) plant varieties, as pairs which were similar except for one character with contrasting traits. Some of the contrasting traits selected were smooth or wrinkled seeds, yellow or green seeds, inflated (full) or constricted green or yellow pods and tall or dwarf plants.
Table
|
S.No.
|
Characters
|
Contrasting Traits
|
|
1.
|
Stem height
|
Tall / dwarf
|
|
2.
|
Flower colour
|
Violet / white
|
|
3.
|
Flower position
|
Axial / terminal
|
|
4.
|
Pod shape
|
Inflated / constricted
|
|
5.
|
Pod colour
|
Green / yellow
|
|
6.
|
Seed shape
|
Round / wrinkled
|
|
7.
|
Seed colour
|
Yellow /green
|
(i) How many pure line breed with contrasting traits is used by Mendel in his experiment?
(ii) For how many years, Mendel performed experiments on pea plant?
(iii) Which are the following traits are recessive taken by Mendel in his experiment? Dwarf plant, white flower, constricted pod, wrinkled seed, tall plant, yellow seed colour
(iv) Choose the dominant traits from the following.
(a) Dwarf plant (b) Wrinkled seed (c) Constricted pod (d) Yellow seed colour
//X
(no answer)