Imagine designing bacteria that can do whatever you want - from cleaning up oil spills to churning out the latest cancer treatments - ordering the biological parts online and building it in a couple of weeks. This is no longer the stuff of dreams, but the reality of synthetic biology. Plus, tracing European genes, how parasites manipulate our immune systems, I take part in a research project to find out if sociability is in my genes, and our gene of the month is looking for wedded bliss.

When it comes to figuring out which genes and genetic variations are linked to particular traits and diseases, there's only one way to do it, and that's to go large, with cohort studies involving hundreds or even thousands of volunteers. We meet the Born In Bradford bunch, a Canadian cohort, and more than a few pairs of twins. Plus, oh my God, they killed our gene of the month!

There's more to life than the four letters of DNA, and our cells use a chemical tag known as DNA methylation to mark out certain parts of the genome, helping cells to remember what they're doing. And, as you might expect, it's pretty important. Plus, how your GCSE success could be encoded in your genes, an important molecular cause of autism identified, and an illuminating gene of the month.

Genes are the instructions that tell our cells what to do, but how do different types of cells know which genes to switch on or off at the right time? The solution lies in epigenetics - the molecular bells and whistles that act on top of our DNA to control gene activity. Plus, a new gene involved in severe obesity, and a mythical gene of the month.

For centuries, breeders have been selecting plants and animals with desirable genetic traits. So how have some of these changes come about, and where will new genetic technologies take our food in the future?

You may not realise it, but all the food you eat has been genetically altered over time by plant and animal breeders, capturing advantageous traits to grow more nutritious and easy-to-farm foods as efficiently and healthily as possible. Maize, or corn as it's often know, is a prime example of this change. Plus, is attractiveness to mosquitoes in your genes? And our gene of the month is small but significant.

There are few things in life as important as the food we eat, but making sure that we guard the genes in our crops for the future is just as important. Plus, we take a look at some of the intellectual property issues surrounding our food, learn squid's surprising secret, and our gene of the month might be a mayor.

Over the past year the Government has unveiled an audacious programme under the banner of Genomics England, aiming to sequence the genomes of 100,000 people affected by cancer and rare genetic diseases. We take a look at some of the practical and ethical issues around the project. Plus, our gene of the month comes from the land of the forever young.

Genetically modified, or GM, crops are a hot topic. Some people are deeply suspicious of the technology while others see it as an effective and efficient way of generating bountiful, healthier harvests. Plus, purple tomatoes, a giant of a gene involved in heart disease, and what's in a name? We take a look at the naming of genes.

How do we learn complex tasks like playing the piano? Why can we remember things better after a good night's sleep? And why do people - and fruit flies - drink again after the hangover from hell? The answers are all in your genes. Plus, why large-scale searches for so-called "genes for schizophrenia" and other psychiatric diseases are turning out to be trickier than we thought, and a gene of the month with a touch of Scottish - or maybe Hollywood - spirit.