I need help with a biology question on crossing plants and determining the f1 generation!?

In four o'clock plants, red flowers are incompletely dominant over white flowers. The heterzygous flowers are pink. If a red- flowered four o'clock plant is crossed with a white- flowered four o'clock plant, what will be the flower color of : - the f1 generation - the f1 generation crossed with its white parent - the f1 generation crossed with its red parent.





Please help me, im not sure where to start! I just leared dihrbrid crosses but am getting stuck here!


Thanks!|||W- red w-white





W W


w Ww Ww


w Ww Ww


100% of the F1 generation will be heterozygous, so all flowers will be pink.





W W (red parent crossed with F1 generation)


W WW WW


w Ww Ww


50% will be red (WW) and 50% will be pink(Ww)








w w (white parent crossed with F1 generation)


W Ww Ww


w ww ww


50% will be white(ww) 50% will be pink(Ww)|||RR x rr will yield Rr plants



The F1 generation will be pink.



If the F1 generation (Rr) is crosses with a white parent (rr) the F2 generation will be 50% pink and 50% white



If the F1 generation (Rr) is crosses with a red parent (RR) the F2 generation will be 50% pink and 50% red|||So if I understand correctly, Red flowers are homozygous (RR) and white flowers are homozygous (rr). Pink flowers are heterozygous (Rr).


F1= RR x rr = all Rr (all pink)


Rr x rr = 50% Rr and 50% rr (half pink half white)


Rr x RR = 50% Rr and 50% RR (half pink half red)





Does that help?