Edward Willett

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A blogger reviews Genetics Demystified

JinxIdoru (a blog) has reviewed Genetics Demystified, and rather favorably, too:I have to say that if all of the Demystified books are as good as this one, then I am sold. It was very clear and explained complicated concepts in an understandable form. The quizzes were a great way to check my grasp of the material and gave me direction as to the parts of the chapter that I may not have fully grasped. I will definitely read more of these books.Nice to hear!

Posted by Edward Willett at 13:13, April 20th, 2007 under Blog | Comment now »

Made-to-order DNA…

...is about to get a lot easier to create:Installing one of those prefab, snap-together wood-flooring kits is a lot easier than shaping and sanding rough planks. Adapting a similar construction strategy, a biotech startup called Codon Devices, based in Cambridge, MA, aims to streamline genetic engineering. It makes made-to-order DNA strands, freeing scientists from the finicky work it takes to put together a complicated piece of DNA the old-fashioned way.That capability could soon change the face of molecular biology. As it becomes cheaper and cheaper to create large chunks of genetic material from scratch, scientists will be able to make ever more complex biological creations. "In the next few years, we'll probably see people engineering ...

Posted by Edward Willett at 15:26, April 9th, 2007 under Blog | 1 Comment »

A loaf of bread, a jug of wine, and dissimilar major histocompatibility complexes

The candlelight is gleaming, soft jazz is playing, the fireplace is crackling, and you're snuggled on the couch with the woman you love. You finger the diamond ring in your pocket. There'll never be a better time to pop the question. You look deep into her eyes and say, "My darling, why don't we get tested to find out how similar our major histocompatibility complex genes are?It might be a mood-spoiler, but it might save you a lot of grief down the road, according to new research by a team led by Christine Garver-Apgar, a psychologist at the Universityu of New Mexico in Albuquerque, and recently reported by New Scientist.The researchers analyzed the genetic makeup ...

Posted by Edward Willett at 16:24, January 9th, 2007 under Blog | Comment now »

Man-made life

For as long as I remember, there have been jokes and pop-culture references to scientists creating life in a test tube--usually with the understanding that such a thing was an impossibility outside of horror movies. But last week scientists in the U.S. announced their intention to create the first completely artificial form of life, a man-made microbe that has never existed in nature in any form. The scientists behind the project are Dr. Craig Venter, already famous for heading up the privately-funded effort to discover the complete human genome, and Dr. Hamilton Smith, a Nobel Prize-winning geneticist. Dr. Venter first proposed creating an artificial life form in 1999, after a team from the Institute for ...

Posted by Edward Willett at 11:16, November 26th, 2003 under Blog, Columns, Science Columns | Comment now »

Have yourself a genetically modified little Christmas

Searching for the perfect Christmas tree can be a hassle, and even a tree that looks great on the lot can turn out to have weird branches, flat spots or gaps once it opens up. But someday soon, every Christmas tree may be perfect, thanks to science. Around 40 million Christmas trees are harvested every year in the U.S. and Canada, most from Christmas tree farms. A small to medium tree farm will harvest 10,000 trees, and some of the multinational giants harvest up to a million trees annually on plantations from North Carolina to Nova Scotia. (Christmas tree farms, by the way, are also oxygen farms. One acre of ...

Posted by Edward Willett at 11:53, December 14th, 1999 under Blog, Columns, Science Columns | Comment now »

The spider-goat clones of Montreal

  Cloned, genetically altered goats producing spider silk in their milk sounds like something out of The X-Files, but it was in all the papers last week when a company called Nexia revealed it had cloned three goats (Clint, Danny and Arnold), and explained why. The cloning of goats brings to four (sheep, mice, cows and goats) the number of species that have been cloned since Dolly the sheep made headlines a couple of years ago, using a process called nuclear transfer. A clone is an exact genetic copy of an existing animal. Every cell in an animal's body contains the complete genetic information for the entire animal within its nucleus. In nuclear transfer cloning, cells are taken from the animal ...

Posted by Edward Willett at 22:45, May 4th, 1999 under Blog, Columns, Science Columns | Comment now »

DNA fingerprinting

One place science and society frequently interact is within the courtroom. Seldom has that interaction been more dramatic than in the past few days, with the exoneration of Guy Paul Morin, who had served 18 months in jail for a murder he didn't commit, and with the start of the murder trial of a certain well-known ex-football-player. In both instances, a relatively new technology called DNA fingerprinting has been in the limelight. DNA, deoxyribonucleic acid, is the complex substance that contains all the genetic information that makes us, not only human, but distinct individuals. It exists in the nucleus of almost every human cell as a huge, coiled molecule that, fully stretched out, ...

Posted by Edward Willett at 16:31, February 7th, 1995 under Blog, Columns, Science Columns | Comment now »

Heredity

"She's got her father's eyes." "He's got his mother's nose." From the moment a baby is born, expect children to look like their parents. But how does it happen? An Austrian monk named Gregor Mendel took the first step toward our modern understanding of heredity in 1866, when he published a theory of inheritance based on his experiments with pea plants. Mendel studied seven characteristics. For example, he crossed a tall strain of pea plants with a short strain. The first generation of crossbred plants were all tall. When he bred those plants together, though, three quarters of the offspring were tall and one quarter were short....

Posted by Edward Willett at 11:13, February 28th, 1994 under Blog, Columns, Science Columns | Comment now »

The Human Genome Project

I've written before about the genetic code and how it writes a description of each of us using an alphabet of only four letters: the four bases that are contained in deoxyribonucleic acid (DNA), adenine (A), guanine (G), cytosine (C) and thymine (T). Every organism has different proportions of these four bases. Two strands of DNA run parallel to each other, but in opposite directions, forming the famous "double helix." In the centre of the molecule, weak chemical interactions between the bases hold the strands together. Adenine (A) always forms bonds with thymine (T), while cytosine (C) always binds with guanine (G). The sugar and phosphates that are also part of DNA form ...

Posted by Edward Willett at 4:44, May 5th, 1992 under Blog, Columns, Science Columns | Comment now »

DNA

Our 26-letter alphabet often seems like a model of efficiency. Look at how much information can be encoded and passed on with it. Look at what Shakespeare accomplished with it. I'm particularly fond of it because my ability to manipulate it is what pays for my food and lodging and other necessities like new CDs. But there is another alphabet that makes the English one of 26 letters look grossly overstocked. With just four letters, it manages to encode and transmit all the information necessary to create a living creature, from the lowliest bacteria to the mighty blue whale to us. That's the alphabet of the genetic code, and its ...

Posted by Edward Willett at 16:24, November 6th, 1991 under Blog, Columns, Science Columns | Comment now »