Question

5. (5 points) In a dihybrid cross between RrTt and RRtt, what are the genotype and phenotype ratios of the offspring, assuming R and T are dominant? R codes for round seed, while r codes for wrinkled seed. T codes for tall height, while t codes for short height. (Show your Punnett Square).

Answer 1

maybe someone else has asked this

Answer 2

I would love help to get it started such as: Rrtt, RRTT and so on. I am jst confused in how to start this and would appreciate any help I can get

Answer 3

well u need to understand that there are standard ratios for the genotype and phenotype for a dihybrid cross. u can google those. that might be a start

Answer 4

u can than do the entire dhybrid cross and c if u get the same ratios so u know where they came from

Answer 5

This is what I have so far:Rr Tt RT rt RRRr RRTt RRRT RRrt ¼ R or 25%
Rrtt Tttt RTtt rttt
RtRr RtTt RtRT Rtrt
RtRr RtTt RtRT Rtrt
Cross between
RR tt Rt Rt

Answer 6

it Rr Tt RT rt RRRr RRTt RRRT RRrt ¼ R or 25%
Rrtt Tttt RTtt rttt
RtRr RtTt RtRT Rtrt
RtRr RtTt RtRT Rtrt
Cross between
RR tt Rt Rt
did not post exact but my punnett square looks like the above

Answer 7

i think that u can do 2 punnet squares for both scenarios given and then for the specific questions u can use the ratios from each square and use the "and or" rules to find the answers

Answer 8

and or rules meaning?

Answer 9

recessive versus dominant?

Answer 10

well this isn't concerning ur specific questions but when doing dihybrid crosses, some ppl will ask questions such as "what is the probability that a offspring will x AND x" or "what is the probability that so and so will have x OR x" where x is a specific trait that they would want.

Answer 11

what are the genotype and phenotype ratios of the offspring, assuming R and T are dominantwell it is asking

Answer 12

i dont kno why it mixes my sentences up but it is asking what are the genotype and phenotype ratios of the offspring, assuming R and T are dominant

Answer 13

so the genotype and phenotype would be the answers in the punnett square right?

Answer 14

just trying to figure out the ratios or percentages, thank you

Answer 15

im assuming F2 generation then?
phenotype: 9:3:3:1
genotype: 1:2:2:4:1:2:1:2:1

Answer 16

so can you explain how you got that thanks so much

Answer 17

http://en.wikipedia.org/wiki/File:Dihybrid_cross.svg
paste this. wikipedia does as well a job as i could

Answer 18

thank you so much

Answer 19

np

Answer 20

I have a couple more problems do you have time to help?

Answer 21

um just post them and tag my name im gonna eat soon but just make a new question

Answer 22

ok thanks