Answer:
it mean that the allele for brownish fingernails is dominant of that for pinkish fingernail
Explanation:
A dominant allele is an allele which expresses phenotypically whether it is heterozygous or homozygous.
For a the brownish fingernail to be expressed in the offspring it means that the allele for brownish fingernail is dominant over the allele for pinkish fingernail. However, it also means that although recessive, the offspring is a carrier of the allele for pinkish fingernail also and this will find expression phenotypically if he mates with another individual with a heterozygous brownish fingernail.
