The path of primordial germ cells illustrates the complexities of imprinted DNA, which contains epigenetic marks that turn on and off when necessary. Differences between the maternal and paternal ...

Germ-cell specification and suppression of the somatic ... Subsequently, sex-specific imprints are established during male and female gametogenesis, and the de novo DNA methylation machinery ...

The study found that removing germ cells affected the lifespan of male and female killifish differently. In females, germ ...

As in humans, female killifish live longer than males. However, when the researchers removed the germ cells from these fish, they found that males and females had similar lifespans. "After ...

The cortical cords begin to break up into isolated cell clusters. The cords surround the primitive germ cells, forming ovarian follicles. The follicles replicate through mitosis, producing ...

A germ cell tumor (mass) most often forms in the gonads. In females, they’re in the ovaries. In males, they’re in testes (TEST-eez). Ovaries are the 2 female glands where eggs form. They also make the ...

Two weeks after a human egg is fertilized, primordial germ cells (PGCs), which develop into sperm and eggs, are formed. In six to 10 weeks after fertilization, PGCs differentiate into pro ...