Punnet squares

Sample Punnet Squares




mono-hybrid



































Test Cross (single gene)

AAaa

ORAaaa








AA

aAaAaAll Dominant

aAaAa












Aa

aAaaa50:50

aAaaa






Hybrid Cross


Aa x Aa




Aa

AAAAa

aAaaa

Dihybrid










































































ParentalAA BB

X

aabb

Note: this is for double dominant by double recessive.

AAbb X aaBB
F1 (dihybrid)

AaBb






AaBb
Dihybrid Cross (F2)









AB

AbaBab





AB

AABBAABbAaBBAaBb

9/16 A_B_




Ab

AABbAAbbAaBbAabb

3/16 A_bb




aB

AaBBAaBbaaBBaaBb

3/16 aaB_




ab

AaBbAabbaaBbaabb

1/16 aabb






























ParentalAA BB

X

aabb

Parental (2)AAbb
aaBB
F1 (dihybrid)

AaBb
















Test Cross

AaBb

X

aabb















AB

AbaBab





ab

AaBb

AabbaaBbaabb




0.25

0.250.250.25