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SEM of human sperm male and female types

SEM of human sperm male and female types

P624/0076

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Credit

DR TONY BRAIN / SCIENCE PHOTO LIBRARY DR TONY BRAIN / SCIENCE PHOTO LIBRARY

Caption

Scanning Electron Micrograph (SEM) of mature human sperm, colour-coded to symbolise those with an X (male) or Y (female) sex chromosome. X chromosome (pink) sperm produce a female foetus after fertilisation; Y chromosome (blue) sperm produce a male foetus. Since the egg always contains an X chromosome, it is the sperm that determines sex of the foetus: male (XY), female (XX). Sperm are the motile male sex cells produced in the testis. Each sperm has a head containing the genetic material, a neck, and a tail that enables it to swim. Millions of sperm are produced by the male, but only one can fertilise the egg. Magnification x1100 at 6x4.5cm size.

Release details

Model release not required. Property release not required.

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