Question

Mendel crossed pea plants having yellow seeds ( $YY$ ) with pea plants having green seeds ( $yy$ ). Yellow seeds are obtained in $F_1$ progeny which undergoes self-pollination to produce $F_2$ progeny. Select the option showing the result of $F_2$ progeny.

A.
3 green : 1 yellow
B.
1 yellow : 1 green
C.
3 yellow : 1 green
D.
2 green : 2 yellow

Accepted Answer

C. Crossing $YY 	imes yy$ gives $F_1$ genotype $Yy$ (yellow). Self-pollinating $Yy 	imes Yy$ yields genotypes $YY, Yy, Yy, yy$ in a 1:2:1 ratio. The phenotypic ratio is 3 Yellow : 1 Green.

Mendelian Monohybrid Cross F2 Progeny

Explanation

Practise this under board exam conditions