phenotype and genotype ratio

[merv]

[quote="MrMistery"]dude, i think Craig Ventner more likely said 'leave behind in history' not 'live behind in history', which are sort of differnt. I know you;ll correct me if i am wrong.

[Brittney]

Hey everyone. I need help from you again

I'm confused about phenotype and genotype ratio after you do a monohybrid cross.

for example, after the cross, I have RR Rr Rr rr, the genotype is 1:2:1 and the phenotype is 3:1, right?

but what if I have Rr Rr rr rr? Is the phenotype 2:2 and genotype 1:1?

what about Rr Rr Rr Rr?

My book doens't explain it very well, please help me guys!

hey i so don't get it either

[Brittney]

does anyone know how to use phenotype ratios its so confusing i am just trying to raise my grade being in high school its rough i really need to good i don't feel like retaking classes as a junior or sophomore so i really need help in school it is like learning a new language so if anyone can help me i will soooooo appreciate it

[Brittney]

Ok,

I am not so good at biology and the teacher and I dont get along so great, so that doesn't help. I have a 7 page homework assignment that I'm deffintly not going to finish..Here's an example of a question... In mice, long ears is dominant to short ears. What are the genotypic and phenotypic ratios id you cross a homozygous long eared mouse with a short eared mouse? so yeah..can anyone help me?! pleaaaase... if so like send me a pm or something and I'll hopefully get this done!

awww thats so sad i do but the teach goes so fast i fall and so does my grade

[Brittney]

this is really confusing please help i need to pass a test

[JackBean]

what's your problem?

[MyKnowledge23]

Can someone please give a example and explain it please? ) Thank you!

[JackBean]

explain what?