Aa x Aa
Bb x bb
Dd x DD
The gene for free Ear Lobes,
E, is dominant among
humans and e is recessive for
attached earlobes. What
would the results (offspring)
from a cross between a
woman with the genotype Ee
and a man with the genotype
Ee?
The gene for a Dimple chin, , is
dominant among humans.
What would the results from a
cross between a woman with
the genotype Dd and a man
without a dimple chin?
In purple people eaters, onehorn is dominant and no horns
is recessive. Draw a Punnet
Square showing the cross of a
purple people eater that has
horns with a purple people
eater that does not have horns.
(multiple answers accepted)
Working Backwards:
For mice, the allele for
Grey fur, G, is dominant
over the recessive allele for
white fur, g. Suppose 2
Grey parents have 4 micethree grey and 1 white.
Homozygous Recessive
x
Homozygous Dominant
(use any letter that has a
different looking capital than
lowercase)
Tom’s father was a
purebred tongue roller
and his mother was
heterozygous tongue
roller.
Joan had two albino
rabbits. When these
rabbit parents had bunnies,
all four bunnies were also
albino.
AAaa x aaAa