Related Experiment Video
Updated: Aug 19, 2026

Making Gynogenetic Diploid Zebrafish by Early Pressure
Published on: June 30, 2009
Gynogenesis caused by ultraviolet irradiation of salmonid sperm
Abstract:
Gynogenetic rainbow trout lines can be produced easily with the simple UV sperm irradiation technique detailed in this study. The dose effect on embryonic survival rate is called a pseudo "Hertwig effect" because of major differences with results of gamma irradiation: Some mixing of various karyotypes (from diploid to haploid number) were obtained with mean doses, probably because of the weak penetrating power of the ultraviolet rays. Irradiations lasting 4 minutes of more are required to produce homogeneous haploid progeny; heat shock applied to such fertilized eggs results in diploid fry of the maternal phenotype.
Related Concept Videos
Spermatogenesis
Oogenesis
Fertilization
Nondisjunction
Spermatogenesis
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...
Oogenesis
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...

