Male and "female" sperm types. 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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Brain, Dr. Tony |
Bildgröße: | 3543 px × 2672 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |