Answer:
1. Black flower - BB(homozygous)
white flower- bb(homozygous)
2. All black offspring are Bb(heterozygous black)
3. BB X bb produce all Bb offspring (F1 generation) bcoz B (black) is dominated over b (white).
4. Bb X Bb produce
BB (black) : 2 Bb ( black) : bb (white)
5. In image
6. 3/4 or. 75% black
7.1 /4 or 25 % white
8. BB is 1/4
Bb is 2/4
bb is 1/4
9. In image
I explained it very well.. Hope this helps you..