What is the gene make up of two parents 2 black guinea pigs produces some and white pigs?

* Black guinea pig 1: BB (homozygous dominant for black coat color)

* Black guinea pig 2: Bb (heterozygous for black coat color)

Possible offspring genotypes:

* Black guinea pig: BB (homozygous dominant for black coat color; dominant phenotype)

* Black guinea pig: Bb (heterozygous for black coat color; dominant phenotype)

* White guinea pig: bb (homozygous recessive for white coat color; recessive phenotype)

Phenotypic ratio:

* Black guinea pigs: 75%

* White guinea pigs: 25%