Ruby's father has curly hair and her mother has straight hair. ruby, however, has wavy hair. what could be the reason for this?
a. ruby's wavy hair is a blend of curly and straight hair.
b. the gene for curly hair has multiple alleles, and ruby has the allele for wavy hair.
c. ruby inherited both alleles, which are incompletely dominant.

I believe that Ruby inherited both alleles, which are incompletely dominant. This is the reason as to why She ended up having wavy hair. These alleles were given by her parents and are different therefore are called heterozygous alleles.

Wavy hair is caused by heterozygous alleles. Straight and curly is caused by homozygous alleles when they are the same type.

C) Ruby inherited both alleles, which are incompletely dominant.

I hope it helps, Regards.