A) Phase contrast images of KTB cell lines. B) KTB cell lines form acini on matrigel. C) Highly discriminative ancestry informative 41-SNP genomic analyses of KTB cell lines show expected heterogeneity in Hispanic women (KTB21, KTB22, and KTB26) compared to Caucasian (KTB6, KTB34, KTB36, and KTB37) and African American Women (KTB8, KTB39, KTB40, and KTB42).