El color marrón en los ojos está determinado por el alelo M. Una mujer de ojos marrones cuya madre tenía los ojos azules y cuyo padre era Homocigótico, decide tener 4 bebés con un hombre de ojos marrones. El padre de éste también tenía los ojos azules y su madre era Homocigótica. La presencia de color marrón en los ojos domina sobre el azul.

Explanation:

Here's a clearer rendering of text;

"The brown color in the eyes is determined by the M allele. A brown-eyed woman whose mother had blue eyes and whose father was Homozygous, decides to have 4 babies with a brown eyed man. His father also had blue eyes and his mother was homozygous. The presence of brown in the eyes dominates the blue".

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.