Chromosphaera perkinsii, a billion-year-old species, may reveal multicellularity’s origins, predating the chicken and egg.

This structure is now termed an embryo ... It is 100 to 150 micrometers wide, or roughly the same size as the egg cell. The blastocyst has only three parts: the inner cell mass (A), the ...

A cell of the ichthyosporean C. perkinsii showing distinct signs of polarity, with clear cortical localization of the nucleus ...

The spermatozoon has a flagellum, which is a tail-shaped structure that allows the cell to propel and move. In contrast, each egg cell, or ovum, is relatively large and non-motile. During ...

Mature egg cells, or oocytes, are essential for fertilization in assisted ... where typical egg maturation techniques often ...

Mature egg cells, or oocytes, are essential for fertilization in assisted reproductive technologies. However, some 'denuded' ...

The egg cell travels through the oviduct towards the ... Scientists worked out the structure of DNA in the 1950s. In 1951 Maurice Wilkins and Rosalind Franklin, both working at King's College ...

Their findings are published in the journal Genes to Cells. While it has been possible to reconstruct the partial structure ...