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本帖最后由 细胞海洋 于 2010-1-19 08:20 编辑
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A Dictionary of Genetics- J( l5 U/ o7 I# y- l o( G
Preface4 k5 F) R0 d9 y6 p% g4 n
The field of genetics continues to advance at an astounding pace, marked
( M" w2 O6 k; X2 vby numerous extraordinary achievements in recent years. In just the past
, Q9 m+ Q5 t0 xten years, the genomic sequence of a multitude of organisms, from archaebacteria
& d) H2 _( [. tto large eukaryotes, has been determined and in many cases, comparatively" H1 q# [6 Q3 R4 |" b7 t8 e
analyzed in remarkable detail. Expressed sequence tags are being2 k s1 i# k, v$ [ d8 A
used for the detection of new genes and for genome annotation. DNA% y7 Q7 {- L$ @' N, _! T1 S' t/ y
microarray technology has taken the study of gene expression and genetic: G; @* @. M5 A. |# v0 p4 W
variation to a global, genome-wide scale. Hundreds of new genes and microbial
1 ?6 A$ N' \( M3 U+ n) wspecies have been identified by reconstructing the DNA sequences& Q% [" e: x r Z
of entire communities of microorganisms collected in environmental samples.
/ m; q* a' j+ EA wide variety of new regulatory functions have been assigned to& \4 n& ]7 ~2 z! S p
RNA, and RNA interference has become an effective tool for creating loss
+ l/ r* N! L" a- m; X1 nof function phenotypes.
5 r) D* k' {/ h5 {Such momentous advances in genetics have been accompanied by a deluge
5 L5 |1 ^8 o( b- Nof new experimental techniques, computational technologies, databases
+ R; Z0 @ p9 J8 Jand internet sites, periodicals and books, and, of course, concepts
6 \9 ~/ d3 b% |5 ?. o3 h( Fand terms. Furthermore, as new terminology emerges, many old terms inevitably% J$ N f r( w: w) l! B
recede from use or require revision. All this is reflected in the8 T- |" T" y0 ~- Z" U+ n
changing content of A Dictionary of Genetics, from the publication of its; z4 [. b& B# H4 {* J
first edition to this seventh edition, 37 years later. This new edition has
6 ]7 C0 c' ~! V% L) u6 K( f Sundergone an extensive overhaul, involving one or more changes (additions,7 [& ^7 v7 q! z: A' r
deletions, or modifications of entries) on 95% of the pages of the$ p' U4 U) ~1 m: h' ^# J- c
previous one. The seventh edition contains nearly 7,000 definitions, of8 o9 b1 E' q$ \* D7 q. I1 G% I
which 20% are revised or new, and nearly 1,100 Chronology entries, of2 f# o# y4 \0 n! i: `2 l
which 30% are revised or new. Three hundred of the definitions are accompanied8 y' r2 S, Z' _2 i4 m- C5 Y8 S
by illustrations or tables, and 16 of these are new. In addition,, V# ^1 y, Q3 Z9 j; x6 T& P
dozens of recent research papers, books, periodicals, and internet sites of
8 \% @* q& O1 _. C* M; `6 [/ Fgenetic importance have been added to the appropriate Appendices of the
0 C+ W3 S+ D" J" |( b. {current edition.6 X& d' y7 s% g7 ~
The year 2006 marks the 100th anniversary of the introduction of the4 ]; h3 q2 U# Q' R' t/ g
term genetics by the British biologist William Bateson. In this seventh edition6 E- o3 q2 J( R0 q& e3 N
of A Dictionary of Genetics, the term genetics itself has been updated,) Q6 i3 b Y1 k. c% I
reflecting progress in understanding and technique over the years, and necessitated
- S* u& w+ y' L% w1 o: _by the convergence of classical and molecular genetics. Genetics5 z+ |& o& @7 k- b; A, L% O' T. n' w
today is no longer simply the study of heredity in the old sense, i.e., the
4 H( b1 F0 d% b' C/ Y( Fstudy of inheritance and of variation of biological traits, but also the study。。。。。。。。。
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发表于 2010-1-19 03:05
