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The Truth About Ourselves
The human genome sequence has been completed
and shows some surprising findings. Despite having one-third less genes
than estimated, human beings are still very complex. With access to disease
genes, medicine and diagnostics will be revolutionised. However, this
will also raise ethical questions on cloning and genetic privacy.
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STATES
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Hope
In Hell
Four weeks after the earthquake, Gujarat is still
coming to terms with the devastation. True grit is emerging from the rubble
but it will be some time before lives are rebuilt. INDIA TODAY's teams
went out across these death zones, capturing stories which record this
renewal.
Simmer
Time
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BUSINESS
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Profitable Loss
36 With over 90,000 employees opting for the
VRS scheme, PSU banks are set to get over their problem of overstaffing.
But is it going to make banks more competitive in this age of automation?
Besides, it is also going to cost more than Rs 7,500 crore and will deprive
the banks of skilled workers.
Paper Money
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NEIGHBOURS
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Spreading Terror
The attacks on Delhi's Red Fort,
the Srinagar airport and the city's police control room show the Lashkar-e-Toiba
is increasingly catching the Indian security forces unawares-and emerging
as the most daring terrorist group from Pakistan.
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Home |
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COVER
STORY: HUMAN
GENOME
ORIGINS
Is
this the end of racism?
Hitler
had it totally wrong. And we might have all descended from Eve after all.
And gosh, Eve could even have been black. That's what a close analysis
of the human genome sequence tells us.
When the
scientists made genome sequence comparisons among various races-Caucasian,
Afro-American and Asian-the findings astonished them. The similarities
were so striking that for every 10,000 letters they cracked, the difference
between a black and white person was just a single letter. In contrast,
you are more likely to find two people of the same community being more
different. "There is no molecular support for racial distinction
among human groups," says Chad Nusbaum, assistant director, Sequencing
Center at the Massachusetts Institute of Technology (MIT) Center for Genome
Research, who has been closely associated with the project. Nusbaum's
conclusion: "Race characteristics are very superficial from the genetic
perspective."
According
to the "Eve theory", all human beings inherit certain sausage-shaped
cell structures called mitochondria only from their mother. The DNA, the
genetic matter carried in the mitochondria, can be used to trace human
beings back to the original Eve. The genome sequence now provides a simpler
method. The genetic similarities between different races are being interpreted
as descent from common ancestors. One reason our DNA is so similar could
be that it did not have time
to accumulate many changes. That is one way to trace the beginning of
man. The genome sequence shows that man probably originated on earth about
1,00,000 years ago, a very short time in evolutionary terms. It also means
that all of us probably descended from a small and localised population
of about 10,000 people. Again, because our genes are so similar, the view
that the first man (or woman) originated from Africa could well be correct.
Anthropologists,
therefore, have a powerful new tool to date
the existence of man. So what accounts for the difference in physical
characteristics? According to the team, minor variations were adaptations
more in tune with environmental conditions. And how about the mice? It's
the way the genes function and give instructions. "Essentially, humans
get much more out of their genes," says Nusbaum. It means the same
genes make many more of their products, the proteins, than the ones in
mice do. Which makes understanding how proteins act possibly the final
frontier in understanding genetic differences.
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METRO TODAY |
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Web
Exclusives |
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Re-emergence of rivers,
sweet water springs' there has been much geological speculation after the
earthquake in the Rann of Kutch. INDIA TODAY'S Special Correspondent
Uday Mahurkar weighs the possibilities and concludes it's early
days yet in
Despatches.
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INTERVIEWS
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"I was
very much against the idea of India," says William Dalrymple, author,
The City of Djinns: A Year in Delhi. In conversation with INDIA TODAY's
Sonia Faleiro, he talks about his old girlfriend, Delhi and his
"enormously exciting" next book, The White Moghuls in
Interviews.
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