In the cross between banteng and European cattle all F1 bulls are sterile; their sperm development ceases at the secondary spermatocyte stage.    From Wordnik.com.  [1 Domesticated Banteng] Reference

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.    From Wordnik.com.  [Time Enough For Love]

Each secondary spermatocyte has (22 +X) or (22 + Y) chromosomes.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

What shall be the total no. chromatids in each of the secondary spermatocyte?.    From Wordnik.com.  [Yahoo! Answers: Latest Questions] Reference

2n = 16 in a primary spermatocyte which is in metaphase of first meotic division.?.    From Wordnik.com.  [Yahoo! Answers: Latest Questions] Reference

Difference Between Spermatogenesis and Oogenesis  One primary spermatocyte gives rise to.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

 When primary spermatocyte divides, its cytoplasm is equally distributed between the two secondary spermatocytes formed.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

In the development of the spermatozoa, as in the maturation of the ovum, there is a reduction of the nuclear chromosomes to one-half of those present in the primary spermatocyte.    From Wordnik.com.  [I. Embryology. 3. The Spermatozoön] Reference

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.    From Wordnik.com.  [I. Embryology. 3. The Spermatozoön] Reference

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.    From Wordnik.com.  [I. Embryology. 3. The Spermatozoön] Reference

Pol β-deficient spermatocytes yielded reduced steady-state levels of the SPO11-oligonucleotide complexes that are formed when SPO11 is removed from the ends of DSBs, and cytological experiments revealed that chromosome-associated foci of replication protein A (RPA), RAD51 and DMC1 are less abundant in Pol β-deficient spermatocyte nuclei.    From Wordnik.com.  [Naturejobs - All Jobs] Reference