Genomic clone.
A piece of DNA taken from the genome of a cell or animal, and spliced into a bacteriophage or other cloning vector. A genomic clone may contain coding regions, exons, introns, 5' flanking regions, 5' untranslated regions, 3' flanking regions, 3' untranslated regions, or it may contain none of these...it may. only contain intergenic DNA (usually not a desired outcome of a cloning experiment!).
Germinal epithelium
1. A layer of epithelial cells on the surface of the ovary that are continuous with the mesothelium
2. The layer of epithelial cell lining the seminiferous tubules of the testis, which gives rise to spermatogonia. See spermatogenesis.


