Heterozygous A genotype with one dominant and one recessive gene. Homozygous dominant A genotype with two dominant genes. Homozygous recessive A genotype with two recessive genes. Write a short ...

Thus, only the double homozygous recessive genotype produces a phenotype with no color, and the resulting phenotypic ratio of color to noncolor is 15:1. Today, scientists know that Mendel's ...

In its simplest form, a test cross is an experimental cross of an individual organism of dominant phenotype but unknown genotype and an organism with a homozygous recessive genotype (and phenotype).