6. What is a dominant allele? (A) An allele that has no noticeable affect on an organism's phenotype (B) An allele that totally beats up on a recessive allele (C) An allele that will only have an affect on phenotype in a haploid organism； otherwise its presence will be masked (D) An allele that is very prevalent in a population (E) In a heterozygous individual, the allele that determine's the phenotype