Question

In a cross between plants with pink flowers and plants with white flowers the offsprings of F1 generation all had pink flowers.

Answer 1

hey buddy !! here's your answer...

✔️this is an example of ✴️co dominance... in this the superior allele of red color is not able to express itself completely over white .

hence we get a colour between the two, that is , pink ... this phenomenon occurs in snapdragon flowers.
in parent , pink flowers are represented as Rr while white as rr... In gametes we'll get allele as R , r , r , r ...
Crossing these we'll get genotypes as Rr , rr , Rr, rr .
so white and pink flowers are produced in same ratio in F1 generation.

hope it helps !! ❤️✌️

Answer 2

heya..!

this is the concept of
INCOMPLETE DOMINANCE
EX- Mirabilis jalapa(four o'clock) , Antirrhinum majus(snapdragon).

let us refer red flowers as RR
white flowers as WW

so, pink flowers i.e., intermediate type will be represented as RW

let's check in a punnett square.

pink and white flowers are produced in the ratio 1:1

so, the statement in question i.e., all flowers in f1 are pink is WRONG STATEMENT.

REFER TO THE IMAGE ATTACHED

HOPE THIS HELPS YOU ❤
BE BRAINLY ✌