A heterozygous red tulip pollinates a white tulip. If red is dominant over white, what would be the phenotypes and genotypes of the offspring? How many generations would have to pollinate before you saw a homozygous red tulip?

Question

aaronq · Answer

Do you know how to do punnett squares?

anonymous · Answer

Yes, thank you and I think I did it correctly...50% Rw and 50% ww. Which would mean that the phenotypes are red or white tulips and the genotypes would be Rw or ww, correct? I have no idea how to answer the last part...how many generations.

aaronq · Answer

you're right so far.

well basically recross your offspring until you have a homozygous red tulip, meaning you'd have to cross 2 heterozygotes.

anonymous · Answer

OK thanks. So when I cross the 2 heterozygotes one of the offspring would be RR (homozygous red)...so that means it would take 2 generations correct?

aaronq · Answer

yes

anonymous · Answer

Thanks so much for your help, I really appreciate it!

aaronq · Answer

no problem !