The gene combination of purple flowered pea plants is denoted as (WW) and that of white flowered pea plants…
The gene combination of purple flowered pea plants is denoted as (WW) and that of white flowered pea plants as (ww), when these two plants are crossed F1 generation is obtained.
(a) List two observations made by Mendel in F1 generation plants.
(b) Give the (i) percentage of white flowered plants and (ii) ratio of the gene combinations WW, Ww and ww in F2 generation.
(c) Write one difference between dominant and recessive trait.
Solution
(a) All plants were purple flowered/ No mixed coloured flowers were observed / No white flowered plants were observed / Only dominant parental trait was observed.
(Any two observations)
(b) (i) 25%
(ii) 1 : 2 : 1 /1WW:2Ww:1ww
(c) Dominant Trait: A trait that can express itself in the presence of its unexpressed contrasting trait / Trait express itself always
Recessive Trait: A trait that remains unexpressed in the presence of its contrasting form.
(Any other difference)