In human cells, DNA carries chemical or "epigenetic" marks that decide how genes will be used in different tissues. Yet in a ...

Researchers at the MRC Laboratory of Medical Sciences (LMS) and Imperial College London have shown for the first time that, before they can start developing into egg and sperm cells, the embryonic ...

Meiosis is the generation of germ cells (eggs and sperm). In meiosis, DNA replication is followed by two division cycles: meiosis I, which segregates homologous chromosomes and meiosis II, which ...

In a world that can always use more compassion, Random Acts of Kindness Day is a meaningful reminder of how small actions can make a big difference. In 2026, Random Acts of Kindness Day is celebrated ...

A Florida couple claims a fertility clinic error led to the birth of a “non-Caucasian child” who was not biologically theirs, according to a lawsuit. Tiffany ...

Mitosis has been studied since the early 1880s, to the extent that we now have a detailed, but still incomplete, description of spindle dynamics and mechanics, a sense of potential mechanochemical and ...

The Moment of Fertilization When a sperm attaches itself to the surface of an egg, the egg is almost immediately impervious to other sperm. What happens in the egg during this critical biological ...