Mouse sperm generated in rats

Making gametes such as sperm and eggs from pluripotent stem cells—primitive cells that can make all the tissues—greatly contributes to efficient reproduction of livestock animals and future assisted reproductive medicine. ...

Newly identified gene reduces pollen number of plants

Producing fewer sperm cells can be advantageous in self-fertilizing plants. An international study led by the University of Zurich identified a gene in the model plant Arabidopsis that reduces the amount of pollen. In addition ...

Female gametes prefer sperm with different immune genes

Through clever partner selection, animals can increase the future success of their offspring. With some species, this process continues even after the sex act. Researchers at the Max Planck Institute for Evolutionary Biology ...

Research shows how females choose the 'right' sperm

University of East Anglia scientists have revealed how females select the 'right' sperm to fertilize their eggs when faced with the risk of being fertilized by wrong sperm from a different species.

Explainer: What is a gene?

There's a very confusing exchange in Lewis Carroll's Through the Looking Glass: "When I use a word," Humpty Dumpty said, in rather a scornful tone, "it means just what I choose it to mean—neither more nor less."

How sperm and eggs develop precisely 23 chromosomes each

Researchers at the University of California, Davis have discovered a key tool that helps sperm and eggs develop exactly 23 chromosomes each. The work, which could lead to insights into fertility, spontaneous miscarriages, ...

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