All Crayolians have ten hands with two fingers on each hand. In addition, all the fingers on each Crayolian are the same color, either red, white or pink. A pink-handed Crayolian mates with a white-handed Crayolian. Their offspring are 50% pink handed and 50% white handed.
What inheritance is shown?
Incomplete dominance
or
co-dominance
or
Complete dominance
(Is this Co-dominance?)
sounds much like incomplete dominance. RW=pink
To determine the type of inheritance shown in this scenario, we need to understand the concepts of incomplete dominance, co-dominance, and complete dominance.
In complete dominance, one allele (variant of a gene) is fully dominant over the other. This means that only the dominant allele is expressed in the phenotype, while the recessive allele has no effect. For example, if a dominant allele for black color and a recessive allele for white color are present, individuals with either one or two copies of the black allele will have black fur, while individuals with two copies of the white allele will have white fur.
In co-dominance, both alleles are fully expressed in the heterozygous condition, resulting in the phenotype showing traits from both alleles. For example, if a red allele and a white allele are present, individuals with one of each will express both colors, resulting in red and white spotted fur.
In incomplete dominance, neither allele is fully dominant over the other, and the phenotype of the heterozygote is an intermediate blend of the phenotypes of the two homozygotes. For example, if a red allele and a white allele are present, individuals with one of each will have pink fur.
Based on the information in the given scenario, the phenotype of the offspring, 50% pink-handed and 50% white-handed, indicates incomplete dominance. In incomplete dominance, the heterozygous offspring show an intermediate phenotype compared to the homozygous parents.
Therefore, the inheritance shown in this scenario is incomplete dominance, not co-dominance or complete dominance.