The specific characteristics of the reproductive system of " Biomphalaria tenagophila " are : more than 200 diverticulae of the ovotestis; 7 11 main lobes of the prostate; and presence of vaginal pouch.
12.
Finally, the gonads in true hermaphroditism must be directly examined; atypical gonads with Y line or potential testicular function should be removed but in rare instances a surgeon may try to preserve the ovarian part of an ovotestis.
13.
The ovotestis fills the posterior portion of the visceral cavity, and is composed of large irregular lobules made up almost entirely of eggs, and packed into a dense mass, tapering a little behind and truncated in front.
14.
The sac-like ovotestis extends over the half of the right side of the visceral hump and is not separated into follicles; oocytes are located more in the exterior part of the gonad and the spermatocytes are positioned more in the centre.
15.
Reproductive system : The ovotestis appears composed by pressed acini around a collecting canal which continues into an ovispermiduct presenting a very short smooth-walled proximal segment followed by a bosselated swelling seminal vesicle and finally a relatively short distal segment which ends in the carrefour.
16.
Experiments involving the Sox9 gene, which is initiated by the SRY region of the Y chromosome, have shown the gene s requirement for testicular differentiation from the presence of ovotestis formation within XX Sox9 trangenic mice . ( 6 ) Ovotestis within B6-XYPOS mice allow for gonadal development research within the same tissue to take place in ways previously unavailable.
17.
Experiments involving the Sox9 gene, which is initiated by the SRY region of the Y chromosome, have shown the gene s requirement for testicular differentiation from the presence of ovotestis formation within XX Sox9 trangenic mice . ( 6 ) Ovotestis within B6-XYPOS mice allow for gonadal development research within the same tissue to take place in ways previously unavailable.
