These types of studies may reveal new aspects of chromatin organization in relationship to developmental timing.

What once was called embryology played a modest role in the evolutionary synthesis, mostly about evolution by changes in developmental timing (allometry and heterochrony).

It is thought that the extra cells arise due to mutant miRNAs being unable to repress the gene hbl-1, which also plays a role in developmental timing.

Sleeping and language impairments, seizures, and developmental timing are common in both autism and Rett syndrome (RTT).

Nevertheless, the embryological origins of homologous features often appear significantly different, simply as a result of changes in developmental timing.

It was introduced to differentiate this intra-specific developmental phenomenon from the more widely known heterochrony, which refers to differences in developmental timing between rather than within species.

Nevertheless, a few genera in the slipper snail family (Calyptraeidae) may have changed their developmental timing (heterochrony) and regained a coiled shell from a limpet-like shell.

In relation to developmental timing, von Baer's scheme of development differs from Haeckel's scheme.

Among them, let-7, mir-84, mir-48 and mir-241 are involved in C.elegans heterochronic pathway, sequentially controlling developmental timing of larva transitions.

Selective breeding examples also allow researchers to understand the importance of developmental timing for genetic influences on aggressive behavior.