How much a mother aphid walks around literally decides whether her babies are born with wings or not.
bioRxiv · March 13, 2026 · 10.64898/2026.03.09.709630
Why it matters
Scientists discovered that random 'noise' in a mother's movement acts as a 'stochastic pacemaker' that dictates the physical development of her offspring. This shows that behavioral variation isn't just a byproduct of life, but a mechanism used to decide when to produce winged flyers to escape crowded conditions.
From the abstract
Phenotypic variation within a single genotype under the same environment (intragenetic variation), the biologically meaningful part of Verror, is frequently treated as a statistical nuisance rather than a biological reality, yet it represents an evolutionary driver of fitness that remains poorly integrated into evolutionary theory. The mechanism that translates such stochasticity into deterministic developmental phenotypic outcomes is not well understood. Here, we test a cumulative stochasticity