Scientists worked out the structure of DNA in the 1950s ... 46 chromosomes in total. Human sex cells or gametes (egg and sperm) only contain 23 chromosomes in total. Each chromosome contains ...

The middle piece is packed with mitochondria to release energy needed to swim and fertilise the egg. The tail enables the sperm to swim. The nerve cell is extended, so that nerves can run to and ...

The chromosomes of sperm cells are tightly packaged ... across the zona pellucida surrounding the egg. It may also be that the nucleoprotamine structure protects the genetic material in the ...

Each sperm cell, or spermatozoon, is small and motile. The spermatozoon has a flagellum, which is a tail-shaped structure that allows the cell to propel and move. In contrast, each egg cell ...

Results were published Thursday in the journal Cell. Scientists had previously known about two proteins, one on the surface ...

This is according to a new study led by researchers at Karolinska Institutet and published in the journal Cell ... the 3D structure of egg coat proteins. The interaction between sperm and eggs ...