Biology - M. Murphy
Lab: Genetics of Canis murphius
Step #2 Ears:
Flip your coin and click on the appropriate link below:
Heads: Shows dominant phenotype (E)

Genotype: L_E_
Tails: Shows recessive phenotype (e)

Genotype: L_ee
Long legs
When the phenotype is dominant, we
know there is one dominant allele, but we
can't be certain there are two.  The other
allele might be a recessive.  So, we can't
write for sure what the second allele is in
this case.
When the phenotype is recessive, we know
that both alleles must be recessive so we
can write them both in this case.