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Sperm storage organs in the fruit fly Drosophila melanogaster.Female was first mated with GFP-male and then re-mated with RFP-male. Female sperm storage is a biological process and often a type of sexual selection in which sperm cells transferred to a female during mating are temporarily retained within a specific part of the reproductive tract before the oocyte, or egg, is fertilized.
Females spiders (Pisaura mirabilis) store more sperm from gift-giving males suggesting that sperm storage is under female control through cryptic sperm choice. [8] The increase in sperm storage from the gift giving males might allow females to produce "sexy sons" that also give gifts and increase the fitness of offspring.
Sperm storage has evolved independently to control reproduction in response to the environment. Females have the ability to store multiple spermatophores until they are needed for fertilization. [17] Sperm storage leads to the post-copulatory sexual selection process of cryptic female choice, which occurs when a female removes the deposited ...
And sperm whales function as a family, "Sperm whales are often spotted in groups (called pods) of some 15 to 20 animals. Pods include females and their young, while males may roam solo or move ...
The spermatheca (pronounced / s p ər m ə ˈ θ iː k ə / pl.: spermathecae / s p ər m ə ˈ θ iː s iː /), also called receptaculum seminis (pl.: receptacula seminis), is an organ of the female reproductive tract in insects, e.g. ants, bees, [1] some molluscs, Oligochaeta worms and certain other invertebrates and vertebrates. [2]
Thus, a female's cells will remain in the male's testicles long enough to be converted into sperm. However, there are more serious challenges. Biologists have well established that male sperm production relies on certain genes on the Y chromosome, which, when missing or defective, lead to such males producing little to no sperm in their ...
The film mostly follows three donors and several prospective moms who agreed to let Oppenheim follow them with his camera: Nagel, a teacher who travels the world in an effort to meet up with the ...
Cryptic female choice is a form of mate choice which occurs both in pre- and post-copulatory circumstances in which females of certain species use physical or chemical mechanisms to control a male's success of fertilizing their ova or ovum; i.e. by selecting whether sperm are successful in fertilizing their eggs or not.