Latest Issue of Science News

cover 3/7

Genes & Cells

Topic Image Rail

Pseudomonas fluorescens

Two mutations allowed soil bacteria (Pseudomonas fluorescens) to re-evolve flagella: One pumped up levels of a protein than controls nitrogen uptake, and one that switched that protein’s job to flagella production control.

wheat map

GRAIN TRAIN  Agriculture spread from what’s now Turkey along southern (purple arrow) and northern routes (yellow arrows) into Europe. DNA recovered from soil at the underwater site of Bouldnor Cliff indicates that wheat reached England at least 2,000 years before it was first grown there.

Big Brain

FOLD IT  A gene that only humans have can make the normally smooth outer layer of mouse brains develop folds similar to those in human brains (upper right center). The gene may have been important for the evolution of big human brains.

Genes & Cells

Subscribe to RSS - Genes & Cells