How many b genes are necessary to produce the recessive color

For a recessive allele to produce a recessive phenotype, the individual must have two copies, one from each parent. An individual with one dominant and one recessive allele for a gene will have the dominant phenotype. They are generally considered “carriers” of the recessive allele: the recessive allele is there, but the recessive phenotype is not. so in short, 2

d. planting trees

the trees take in carbon to make oxygen.