spermatocytes

Testicular tissue showing spermatogenesis to the level of secondary spermatocytes.

A childless man appeal philonthroists for treatment 2009

Feeding of freshly irradiated wheat resulted in significantly increased incidence of polyploid cells in bone marrow, aneuploid cells in testis, reduction in number of spermatogonia of types A, B and resting primary spermatocytes as well as a higher mutagenic index.

Archive 2008-08-01 News from Mad Plato 2008

Feeding of freshly irradiated wheat resulted in significantly increased incidence of polyploid cells in bone marrow, aneuploid cells in testis, reduction in number of spermatogonia of types A, B and resting primary spermatocytes as well as a higher mutagenic index.

NUKED FOOD News from Mad Plato 2008

When a spermatogonium was observed to change to a primary spermatocyte-still diploid-it would be segregated and at the instant it divided into two secondary spermatocytes-haploids, one with an X chromosome and one with a Y chromosome-they would be again segregated and each would be encouraged to develop into spermatozoa. \par

Time Enough For Love Heinlein, Robert A. 1973

On comparing this process with that of the maturation of the ovum (Fig. 7) it will be observed that the primary spermatocyte gives rise to two cells, the secondary spermatocytes, and the primary oöcyte to two cells, the secondary oöcyte and the first polar body.

I. Embryology. 3. The Spermatozoön 1918

Each primary spermatocyte divides into two secondary spermatocytes, and each secondary spermatocyte into two spermatids or young spermatozoa; from this it will be seen that a primary spermatocyte gives rise to four spermatozoa.

I. Embryology. 3. The Spermatozoön 1918

The primary germ cells undergo division and produce a number of cells termed spermatogonia, and from these the primary spermatocytes are derived.

I. Embryology. 3. The Spermatozoön 1918

Again, the two secondary spermatocytes by their subdivision give origin to four spermatozoa, and the secondary oöcyte and first polar body to four cells, the mature ovum and three polar bodies.

I. Embryology. 3. The Spermatozoön 1918

Spermatogenesis is not the only source of the testicular hormone: changes in the secretory activity of the interstitial cells or spermatocytes are sufficient to account for periodic development of somatic sex-characters, and the same reasoning applies to the antlers of stags.

Hormones and Heredity J. T. Cunningham 1897

It seems possible, although no such suggestion has been made, that the interstitial cells might either normally or exceptionally give rise to ova and spermatocytes.

Hormones and Heredity J. T. Cunningham 1897