A new type of cat coat color has officially been discovered. Named salmiak, or ‘salty liquorice,’ the cats have hair strands ...

Changes to short stretches of nucleotides are called gene-level mutations, because these mutations affect the specific genes that provide instructions for various functional molecules, including ...

finally teased out the genetic explanation. Resistant individuals had in their cells two copies of a mutation that disrupted the entryway through which HIV viruses entered white blood cells.