KaiserScience

Home » Biology » Genetics » Punnet squares Monohybrid, Dihybrid, and Trihybrid Crosses

Punnet squares Monohybrid, Dihybrid, and Trihybrid Crosses

Monohybrid, Dihybrid, and Trihybrid Crosses
http://www.science.oregonstate.edu/bi10x/otherresources/punnett%20squares.htm

 


Oregon State University
| College of Science | Biology Program | BI 10X | BI 101 | BI 102 | BI 103

Monohybrid, Dihybrid, and Trihybrid Crosses

Shading in each Punnett Square represents matching phenotypes,
assuming complete dominance and independant assortment of genes,
phenotypic ratios are also presented.

Monohybrid Cross (one gene)
A
a
A
AA
Aa
a
Aa
aa
Phenotypic Ratio
3
1

 

Dihybrid Cross (two genes)
AB
Ab
aB
ab
AB
AABB
AABb
AaBB
AaBb
Ab
AABb
AAbb
AaBb
Aabb
aB
AaBB
AaBb
aaBB
aaBb
ab
AaBb
Aabb
aaBb
aabb
Phenotypic Ratio
9
3
3
1

 

 

Trihybrid Cross (three genes)
ABD
ABd
AbD
Abd
aBD
aBd
abD
abd
ABD
AABBDD
AABBDd
AABbDD
AABbDd
AaBBDD
AaBBDd
AaBbDD
AaBbDd
ABd
AABBDd
AABBdd
AABbDd
AABbdd
AaBBDd
AaBBdd
AaBbDd
AaBbdd
AbD
AABbDD
AABbDd
AAbbDD
AAbbDd
AaBbDD
AaBbDd
AabbDD
AabbDd
Abd
AABbDd
AABbdd
AAbbDd
AAbbdd
AaBbDd
AaBbdd
AabbDd
Aabbdd
aBD
AaBBDD
AaBBDd
AaBbDD
AaBbDd
aaBBDD
aaBBDd
aaBbDD
aaBbDd
aBd
AaBBDd
AaBBdd
AaBbDd
AaBbdd
aaBBDd
aaBBdd
aaBbDd
aaBbdd
abD
AaBbDD
AaBbDd
AabbDD
AabbDd
aaBbDD
aaBbDd
aabbDD
aabbDd
abd
AaBbDd
AaBbdd
AabbDd
Aabbdd
aaBbDd
aaBbdd
aabbDd
aabbdd
Phenotypic Ratio
27
9
9
9
3
3
3
1

 

Advertisements
%d bloggers like this: