About Sex - History

Sex

Sex is the trait that determines whether a sexually reproducing organism produces male or female gametes. During sexual reproduction, a male and a female gamete fuse to form a zygote, which develops into an offspring that inherits traits from each parent. By convention, organisms that produce smaller, more mobile gametes (spermatozoa, sperm) are called male, while organisms that produce larger, non-mobile gametes (ova, often called egg cells) are called female. An organism that produces both types of gamete is hermaphrodite.

In non-hermaphroditic species, the sex of an individual is determined through one of several biological sex-determination systems. Most mammalian species have the XY sex-determination system, where the male usually carries an X and a Y chromosome (XY), and the female usually carries two X chromosomes (XX). Other chromosomal sex-determination systems in animals include the ZW system in birds, and the XO system in insects. Various environmental systems include temperature-dependent sex determination in reptiles and crustaceans.

The male and female of a species may be physically alike (sexual monomorphism) or have physical differences (sexual dimorphism). In sexually dimorphic species, including most birds and mammals, the sex of an individual is usually identified through observation of that individual's sexual characteristics. Sexual selection or mate choice can accelerate the evolution of differences between the sexes.

The terms male and female typically do not apply in sexually undifferentiated species in which the individuals are isomorphic (look the same) and the gametes are isogamous (indistinguishable in size and shape), such as the green alga Ulva lactuca. Some kinds of functional differences between individuals, such as in fungi, may be referred to as mating types.

What's New in the Latest Version 1.0

Last updated on Jun 11, 2024

Minor bug fixes and improvements. Install or update to the newest version to check it out!

Translation Loading...

Additional APP Information

Latest Version

Request Sex - History Update 1.0

Uploaded by

Imad Blak

Requires Android

Android 6.0+

Show More

Sex - History Screenshots

Comment Loading...
Languages
Searching...
Subscribe to APKPure
Be the first to get access to the early release, news, and guides of the best Android games and apps.
No thanks
Sign Up
Subscribed Successfully!
You're now subscribed to APKPure.
Subscribe to APKPure
Be the first to get access to the early release, news, and guides of the best Android games and apps.
No thanks
Sign Up
Success!
You're now subscribed to our newsletter.