Frog sperm cell
These unusual patterns of selection might explain why frog sperm typically both the relative proportion of sperm cells that are motile and the. Toluidine blue, applied to frog sperm under appropriate conditions, inactivates specifically the sperm nucleus, leaving the extranuclear parts of the cell. When sperm compete to fertilize available ova, selection is expected to favour ejaculate traits that contribute to a male's fertilization success. Toluidine blue, applied to frog sperm under appropriate conditions, inactivates specifically the sperm nucleus, leaving the extranuclear parts of the cell undamaged. Thus, the dye-treated spermatozoa stimulate eggs to cleave normally, but contribute no chromosomes to the resulting embryos, which develop as typical gynogenetic girlsgotgamevolleyball.com by: Frogs use external fertilisation, this means that the female frog lays thousands of eggs, but then the male sprays sperm on the offspring to fertilise it. So basically the sperm cell and egg cell. In female frogs, this is eggs, or ova, and in males, it is sperm. The pituitary gland is the gland that stimulates the production of these sex cells. The pituitary gland itself is stimulated by external factors such as rainfall, day length and temperature.