Matter as such produces nothing, changes nothing, does nothing; and however convenient it may afterwards be to abbreviate our nomenclature and our descriptions, we must most carefully realize in the outset that the spermatozoon, the nucleus, the chromosomes or the germ-plasma can never act as matter alone, but only as seats of energy and as centres of force.Science is a human endeavor that is rarely if ever just about science: it is also a social, political, and economic enterprise. As such (...) it is structured around an ethos: a belief system, or theory, that accounts for the nature of relevant aspects of existence. Much like other belief systems in the broader culture in which they occur, we build stories in defense... (shrink)

For at least a century it has been known that multiple factors play a role in the development of complex traits, and yet the notion that there are genes “for” such traits, which traces back to Mendel, is still widespread. In this paper, we illustrate how the Mendelian model has tacitly encouraged the idea that we can explain complexity by reducing it to enumerable genes. By this approach many genes associated with simple as well as complex traits have been identified. (...) But the genetic architecture of biological traits, or how they are made, remains largely unknown. In essence, this reflects the tension between reductionism as the current “modus operandi” of science, and the emerging knowledge of the nature of complex traits. Recent interest in systems biology as a unifying approach indicates a reawakened acceptance of the complexity of complex traits, though the temptation is to replace “gene for” thinking by comparably reductionistic “network for” concepts. Both approaches implicitly mix concepts of variants and invariants in genetics. Even the basic question is unclear: what does one need to know to “understand” the genetic basis of complex traits? New operational ideas about how to deal with biological complexity are needed. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Personal Narratives: Parenting Children With Autism Spectrum Disorders Through the Transition to AdulthoodCatherine Cornell, Julie Herren, Susan Osborne, and Kelly WeissTransition years: From Learning, Living and Loving to Maintenance and MediocrityCatherine CornellWhat does every parent of an autistic child worry about the most? For those of us with severely affected children, the answer to that question is: “Who will care for my child and keep her safe when I (...) am gone?”I drove my daughter back to her “group home” for a scheduled drop off on Saturday. There was only one car in the driveway and the house van was gone. Lily was not happy about returning “home.” Agitated, she opened the door to the car, almost before it was stopped, ran to the back of the house, and up the fire escape stairs to the door of her third floor bathroom, as if she was avoiding going through the main living rooms of the house. I called up to her that there was no one at home and she came back down and pushed through the unlocked door. Racing ahead of me, she was already shed of her clothes and in the shower: her self–calming method that she used whenever returning to the house. Thirty minutes later, after three attempts to leave the shower and throwing up in the shower, she dressed and ran back out to our car. I played her favorite music, attempting to calm her anxiety. This transition, from home to “group home,” was increasingly difficult due to recent changes in staff and housemates. Having no one there to greet her was ratcheting up the anxiety level for both of us.When the on–call manager came, Lily was so distraught that I asked for her medications and took her back home with me. Two days later she was calm enough and I was reassured enough to return her to the house. Somehow the house manager made the incident my fault. Perhaps I did react strongly, but on reflection, what triggered the strong reaction in me was the insecurity I felt at finding no one home. It seemed like a breach of trust. Like we were left, abandoned, our plans shattered and at the mercy of fate. Strong emotions for a little mix–up in communications (if that is what it was) but, nevertheless, there it is—how I felt and more to the point how my daughter felt.I relate this story because it illustrates what has changed the most about our lives since Lily left her school and entered the world of adult services: missing is the feeling of trust and security that responsible caring people would keep Lily safe when my husband and I cannot.My 25–year–old daughter Lily has severe autism. She was the most beautiful and easy baby imaginable and appeared to develop normally until she began to lose speech and have night terrors at 15 months of age. She was diagnosed initially with atypical autism, then pervasive developmental disorder not otherwise specified, and finally with autism at age four.From age four to twenty–two, she attended a specialized school for autism where she received age level academics, therapies for speech, and training in self–care and independent living. She did not do well in academics nor did she regain her lost speech. She did learn to care for herself with assistance and, as important, she gained social and behavioral skills and learned to live with others in a social way. She [End Page E1] also learned recreational and vocational skills that would be transferrable to the community, such as bicycle riding, rollerblading, swimming and jogging. The philosophy of her school was to build self–esteem and confidence by teaching music, art and physical skills—in small steps, ensuring success, and then building on those skills.In her last year at school, Lily was a happy and well–adjusted member of her small group of five young women living in a town house with support from trained school staff. She participated in job programs, earning money by recycling and working for Meals–On–Wheels. She went out into the community with her group... (shrink)

The mammalian dentition is a segmented organ system with shape differences among its serially homologous elements (individual teeth). It is believed to have evolved from simpler precursors with greater similarities in shape among teeth, and a wealth of descriptive data exist on changes to the dentition that have occurred within mammals. Recent progress has been made in determining the genetic basis of the processes that form an individual tooth, but patterning of the dentition as a whole (i.e. the number, location (...) and shape of the teeth) is less well understood. In contrast to similarly organized systems, such as the vertebral column and limb, Hox genes are not involved in specifying differences among elements. Nevertheless, recent work on a variety of systems is providing clues to the transcription factors and extracellular signalling molecules involved. (shrink)

Two recent papers1,2 report extensive nuclear DNA sequence from a 38,000‐year‐old Neandertal fossil, comparing it to modern humans and estimating when it diverged from, and whether it contributed to, our gene pool. Based on 65,250 and over a million base‐pairs of sequence across the genome, respectively, the groups arrived at slightly different interpretations. The data are an exciting and interesting new contribution, but are not surprising, and a sense of history and question helps put them in perspective. BioEssays 29: 105–110, (...) 2007. © 2007 Wiley Periodicals, Inc. (shrink)