question_answer

What would be the colour of flowers in \[{{F}_{1}}\] progeny as a result of a cross between homozygous red and homozygous white flowered snapdragon?

A)  Red                                      

B)  White

C)  Both [a] and                     

D)  [d] Pink

Correct Answer: D

Solution :

Snapdragon (.Antirrhinum) shows incomplete dominance in which when plants with red flower (homozygous RR) are crossed with plants having white flower (homozygous rr), the heterozygous Fr hybrid (Rr) bear pink flowers. When the pink flowers are self pollinated, they develop red (RR), pink (Rr) and white (rr) flowers in the ratio of 1:2:1 respectively in F2 generations. Therefore, it can  be shown as