Other diseases, such as heart disease, schizophrenia, and depression, are thought to have more complex heredity components that involve a number of different genes.
Although a mechanism describing this complex heredity cannot be conclusively identified, movement of entire clusters by horizontal gene transfer is the more parsimonious of these hypotheses to explain the discontinuous distribution of cluster types.
The genetics and heredity of complex human traits have been studied for over a century.
Moreover, the comparison between the enzymatic machinery of PP1Y and those of the other sphingomonads able to degrade environmental pollutants suggests that each sphingomonad has independently evolved its own repertoire of degradative enzymes through a complex combination of vertical heredity, horizontal gene transfers, duplications and rearrangements.
They are the result of complex neuroendocrine responses due to heredity, trauma and stress.
Every single body is different and has its own flaws and perfections, the result of a complex play of socioeconomic factors, heredity, health issues, lifestyle choices and a myriad of combinations of those factors.
The influence of heredity on intelligence is complex, involving thousands of genes interacting in such intricate ways that researchers have not yet managed to draw genetic patterns.
However, to date the effort has yet to deliver the revolution in personalised medicine that was promised at the project's inception and geneticists have begun to realise that the relationship between disease and heredity is far more complex, and environment-dependent, than they first thought.
So right off the bat we know that the heredity of hair color is complex; it is not so black and white - or so blonde and brunette - as Martin would have us believe.
Geneticists dismissed eugenics as a pseudoscience, both for its exaggeration of the extent to which intelligence and personality were fixed by heredity and for its naïveté about the complex and mysterious ways in which many genes could interact to determine human traits.
Heredity in microorganisms, however, can be very complex, and even unknown as is the case for coenocytic organisms such as Arbuscular Mycorrhizal Fungi (AMF).
