FIGURE 3.3 Mendelian inheritance patterns Pictured here are the Mendelian inheritance patterns for the offspring of two brown-haired parents who are both heterozygous for hair color. The allele for brown hair (B) is dominant, and that for blond hair (b) is recessive. Note that these parents have three chances out of four of producing children with brown hair. They have two chances in four of producing brown-haired children who carry the gene for blond hair.