border cells

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In Drosophila oogenesis, a group of anterior cells that detach from the follicular epithelium and migrate between the nurse cells in a posterior direction until they reach the anterior surface of the oocyte. Here they later participate in the formation of the micropylar apparatus which allows the sperm to enter the egg. Mutations in the sex-linked genes domeless, hopscotch, or unpaired disturb the migration of the border cells.

Subjects: Genetics and Genomics.

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