Image fromHuman Anatomy Atlas. Once upon a time in utero,we all shared the same set of gonads—regardless of our gender. The female system develops the ovaries, and the male system develops the testes. They still look the same: egglike. The testis produces male gametes (sperm), which co...
The anatomy and histology of the reproductive system of Aplysia oculifera (Mollusca: Heterobranchia: Aplsiida) from the Red Sea coastal watersHistologynidamental glandhermaphroditic ductatrial glandgametolytic glandhistochemistryAMINO-ACIDSGASTROPODAOPISTHOBRANCHIA...
However, the opposite system, with heterogametic females in zebrafish has also been suggested [27]. The inconsistency of results regarding sex chromosomes in zebrafish suggests that the sex determining system is labile and that no clear sex determining chromosome exist. The zebrafish is sexually ...
N., Cheves Hernandez, S., Lopez Navarro, R., Fedigan, L.M., Gurven, M.,Higham, J.P., Jack, K.M. & Melin, A.D.(2024). Wild capuchin monkeys as a model system for investigating the social and ecological determinants of aging.Phil. Trans. R. Soc. B379: 20230482 ...
Unisexual reproduction is generally relevant to polyploidy, and unisexual vertebrates are often considered an evolutionary “dead end” due to the accumulation of deleterious mutations and absence of genetic diversity. However, some unisexual polyploids have developed strategies to avoid genomic decay, ...
similar to the mammalian XY/XX-system [1–3]. Other species, such asPoecilia, have homogametic males and heterogametic females (ZZ/ZW), which also is the case for birds [4]. Some species of the Poecilid platyfishXiphophorus, utilize a system with three sex chromosomes [5]. In yet ...
Additionally, in order to give the students the opportunity to apply his or her new knowledge and skills to reinforce learning and build confidence, competing game of Answering and asking Questions about reproductive system was organized frequently in the lecture. 4) Use general principles for good...