Name: Jennifer yariia Garcia
Date: 4/22/25
Genetic Crosses that Involve 2 Traits - Floppy Eared Bunnies
In rabbits, black hair is dominant to brown hair. Also in rabbits, long
straight ears are dominant to floppy ears.
These letters represent the genotypes and phenotypes of the rabbits:
BB = black nose
EE = long ears
Bb = black nose
Ee = long ears
bb = pink nose
= floppy ears
1. A male rabbit with the genotype BBee is crossed with a female rabbit with
the genotype bbEe The square is set up below. Fill it out and determine the
phenotypes and proportions in the offspring.
Be Be. Be
Be
bE
BbEe
BbEe
BbEe
BbEe
How many out of 16 have:
be
Bbee
Bleee
Bbee
Bbee
black noses and long ears? 8
bE
black noses and floppy ears? 8
BbEe
BbEe
BbEe
BbEe
pink noses and long ears? 0
0
Bbee
pink noses and floppy ears?
be
Bbee
Bbee
Bbee
2. Show the cross: BbEe X bbEe
BE
Be
bE
be
How many out of 16 have:
be
BLEE
BbEe
bbEE
bbEe
black noses and long ears? 6
BbEe
Bbee
black noses and floppy ears? 2
be
bree
Bbee
pink noses and long ears? 6
bE
BbEE
Bbse
bbEe
bb Ee
pink noses and floppy ears? 2
be
BbEe
Bree
bbEe
Bree
