Question

Blue flowered and white flowered plant on crossing gave progeny of blue and white flowered in the ratio of 60:40.What ratio of blue and white is expected if the blue flowered is self pollinated ?

Answer 1

Explanation:

First Ww×ww

so progenies are

Ratio = Ww(Blue) : ww(white) = 60:40(approx)

now only Blue flowers are self pollinated

so ratio = Blue : white is 3:1 =76:24 (approx)

Answer 2

Explanation:

This is a Mendalian biology question

Blue flowers = BB

white flowers = bb

now cross

BB × bb

Bb Bb Bb Bb

all flowers will be blue

now no of blue flowers is 60

if we let those self pollinate

no of offsprings will be 120

and ratio of offsprings will be 3:1

so now no of blue and white flowers will be

90:30