Nirjonmela Desi Forum

Talk about the things that matter to you! Wanting to join the rest of our members? Feel free to sign up today and gain full access!

sex

Organisms of many species are specialized into male and female varieties, each known as a sex. Sexual reproduction involves the combining and mixing of genetic traits: specialized cells known as gametes combine to form offspring that inherit traits from each parent. The gametes produced by an organism define its sex: males produce small gametes (e.g. spermatozoa, or sperm, in animals; pollen in seed plants) while females produce large gametes (ova, or egg cells). Individual organisms which produce both male and female gametes are termed hermaphroditic. Gametes can be identical in form and function (known as isogamy), but, in many cases, an asymmetry has evolved such that two different types of gametes (heterogametes) exist (known as anisogamy).
Physical differences are often associated with the different sexes of an organism; these sexual dimorphisms can reflect the different reproductive pressures the sexes experience. For instance, mate choice and sexual selection can accelerate the evolution of physical differences between the sexes.
Among humans and other mammals, males typically carry an X and a Y chromosome (XY), whereas females typically carry two X chromosomes (XX), which are a part of the XY sex-determination system. Other animals have different sex-determination systems, such as the ZW system in birds, the X0 system in insects, and various environmental systems, for example in crustaceans. Fungi may also have more complex allelic mating systems, with sexes not accurately described as male, female, or hermaphroditic.

View More On Wikipedia.org
  1. R

    LATEST PUNJAB SARDAR JI VIRAL SEX MMS VIDEO

    Download Link- https://upfiles.com/rjGC
  2. NiRob_kabbo02

    Natural Tits Indian College Girl Looking For Sex

  3. R

    LATEST VIRAL MEME GIRL NUDE SEX VIDEO

    Download Link- https://upfiles.com/e0yVO5D
  4. R

    INDIAN TEEN SEX IN CAR AFTER SCHOOL LATEST VIRAL VIDEO

    Download Link- https://upfiles.com/sUXq
  5. NiRob_kabbo02

    beautiful couple haveing sex pictures

  6. R

    NEPALI TEEN GIRLS THREESOME VIRAL SEX VIDEO

    Download Link- https://upfiles.com/1Guv1
  7. R

    Latest Viral OYO Hotel Couple Sex Video

    Download Link- https://upfiles.com/gVPP
  8. venumgall

    Christine Nguyen - Celebrity Sex Tape (2012)

    Christine Nguyen - Celebrity Sex Tape (2012) Duration: 0:02:35 Resolution: 720x576 Format: mp4 Size: 12.99 MB https://filejoker.net/uhhpryro9nho
  9. venumgall

    Jamie Bernadette - Celebrity Sex Tape (2012) 720p

    Jamie Bernadette - Celebrity Sex Tape (2012) 720p Duration: 0:00:43 Resolution: 1280x720 Format: mp4 Size: 11.78 MB https://filejoker.net/66g3x7ppjmoc
  10. Laal

    Videos Cosmic Sex (2015) 1080p BluRay

    Cosmic Sex (2015) Director: Amitabh Chakraborty Stars Cast: Rituparna Sen, Ayushman Mitra, Biplab Banerjee Film Story: One night, Kripa is on the run from sex and violence when he meets Sadhavi, a woman who strangely resembles his dead mother. She gives him shelter and teaches him to travel...
  11. arn43

    Actress Incest Sex (With XxX Images)

  12. B

    Jennifer Lopez Sex Scenes

    The Boy Nextdoor
  13. arn43

    Aishwarya Rai Sex Goddess Sex Pics-03

  14. arn43

    Aishwarya Rai Sex Goddess Sex Pics-02

  15. NiRob_kabbo02

    Toll & slim panjabi girl play with sex Toy

  16. NiRob_kabbo02

    All Bollywood Actress Nude sex picture (Fake)

    All bollywood Actress nude Fake picture
  17. arn43

    Aishwarya Rai Sex Goddess Sex Pics-01

  18. B

    Sex life advise

    কনডম এবং পুল আউট মেথদ ছারা অবিবাহিত কাপল যারা এখনও তাদের বাবা মা এর সাথে থাকে তাদের জন্যে জন্মনিয়ন্ত্রণের সবচেয়ে নিরাপদ পদ্ধতি কোনটি ?
  19. NiRob_kabbo02

    One of the best porn actresses I have ever seen "JESS JOLI " HOT & Nude Sex Photo

    One of the best porn actresses I have ever seen "JESS JOLI"
  20. dev234

    Boy's sex toy kivabe kinle valo hoy?

    Boy's sex toy kotha theke kinle vlo hoy. ? R egula use korle kmn feel pawa jay?
Back
Top