A novel molecular tool developed by a Lehigh University professor of biological sciences is enabling scientists to precisely ...

Sometimes it’s easy to tell if something is living or not. A teddy bear might look like a bear, but it cannot do any of the seven things it needs to be able to do to count as being alive.

Researchers have discovered how egg cells prepare for life by studying the Balbiani body, a structure that organizes key ...

Gametes are an organism's reproductive cells. They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells ...

Reproductive cells—sperm and eggs—contain half the number of chromosomes found in other body cells, a reduction critical for reproduction. When a sperm meets an egg, the resulting offspring ...

Oregon Health & Science University researchers have developed a new lab model to study how changes in cervical mucus during ...

The Principle of Segregation describes how pairs of gene variants are separated into reproductive cells. The segregation of gene variants, called alleles, and their corresponding traits was first ...

In a sexually reproducing species, males and females are defined by the kind of gametes (reproductive cells) they produce. The individuals who produce lots of small, mobile gametes are called males.

Like the brain, he said, reproductive systems "epidemiologically appear to be sensitive" to smoke, and researchers predict sperm cells that mature during intense exposure to smoke will be of lower ...