Dihybrid Crosses

dihybrid crosses

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Monohybrid Cross

P: Round vs Wrinkled Peas

RR

rr

F1: All Round

Rr

F2: 3/4 Round: 1/4 Wrinkled

1/4RR 2/4Rr 1/4rr

What is the trait? Pea Shape

Which phenotype is dominant? Round

What are the alleles? R=round, r=wrinkled

What are the 3 possible genotypes? RR, Rr, rr

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Monohybrid Cross P: Round vs Wrinkled Peas RR rr F1: All Round Rr F2: 3/4 Round: 1/4 Wrinkled 1/4RR 2/4Rr 1/4rr What is the trait? Pea Shape Which phenotype is dominant? Round What are the alleles? R=round, r=wrinkled What are the 3 possible genotypes? RR, Rr, rr

Dihybrid Cross P: Round, Green vs Wrinkled ,Yellow RRyy gametes Ry F1: All Round, Yellow Which phenotypes are dominant? Alleles? R-round r-wrinkled Y-Yellow y-green Ry rrYY gametes rY rY RrYy RrYy Round, Yellow

Page 1: Genetics Dihybrid Crosses
Page 5 and 6: F1 Cross Round, Yellow RrYy X Round
Page 7 and 8: Dihybrid Genotype Ratio RRYY 1/16 R
Page 9 and 10: RrYy x rryy RY Ry rY ry ry RY Ry rY
Page 11 and 12: Your Turn RrYy x Rryy RrYYPp x rrYy
Page 13 and 14: RrYy x Rryy Rr x Rr Yy x yy 1/4 RR
Page 15 and 16: RrYYPp x rrYypp Rr x rr 1/2 Rr 1/2
Page 17: The End

Dihybrid Crosses

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