in my last question i asked. in guinea pigs black coat color B is dominate to white b and rough coat R is dominate to smoth r what are the phenotypic results of the crosses. I have done all the crosses correctly on paper and i need to know how to determain the answer to this question
the answer was BB and Bb will be black; only bb will be white.
RR and Rr will be rough; only rr will be smooth.
in this genotypic result BbRr Bbrr
bbRr bbrr
the answer would White and smooth ? if my answer is correct why is it correct ?
2007-03-20 20:01:30 · 3 answers · asked by jimp1174 1 in Science & Mathematics ➔ Biology
As I understand your question, you say you have already done the cross properly, and have 4 genotypes resulting:
BbRr - Black, rough
Bbrr - Black, smooth
bbRr - White, rough
bbrr - White, smooth
So each of those 4 different genotypes result in a different phenotype.
I also presume that you must have been asked to cross the parents BbRr x bbrr. If so, you are correct in your results, and each genotype and phenotype will have an expected frequency of 1/4
2007-03-20 21:50:40 · answer #1 · answered by SteveK 5 · 0⤊ 0⤋
do a di-hybrid cross, if you do it right you will get a ratio of 9:3:3:1 i think the 1 should be white/smoth
2007-03-21 03:14:39 · answer #2 · answered by m z 1 · 0⤊ 0⤋
I figured it would be purple. boy, was I ever wrong
2007-03-21 03:11:24 · answer #3 · answered by ? 4 · 1⤊ 0⤋