Pink-flowered

Antirrhinum plants

100%

Pink-flowered Pink-flowered

P2 Antirrhinum plants X Antirrhinum plants

RW RW

G2

RR RW RW WW

Red Pink White

F2 flowered flowered flowered

Plants plants plants

1 : 2 : 1

Such non-Mendelian cases can also be exampled by the inheritance of colour in the Andalusian fowl. When crossing take place between black-coloured and white-coloured, F1 generation will have blue colour. While F2 generation will have the three colours black, blue, and white in the ratio 1 : 2 : 1

B : represents the gene for black colour.

W : represents the gene for white colour.

BB : Is the genotype for black-coloured fowls.

WW : Is the genotype for white-coloured fowls.

BW : Is the genotype for Blule-coloured fowls.

Illustrate the production of F1 & F2 generations genetically.