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gigabase

A unit of length for DNA molecules, consisting of one billion nucleotides; abbreviated gb, or gbp for gigabase pairs. The genomes for Homo sapiens and Pisum sativum are 3.2 and 4.1 ...

gigabase

gigabase   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
38 words

... a unit of length for DNA molecules, consisting of one billion nucleotides; abbreviated gb, or gbp for gigabase pairs. The genomes for Homo sapiens and Pisum sativum are 3.2 and 4.1 gigabases, respectively. See base pair , megabase...

gigabase

gigabase  

A unit of length for DNA molecules, consisting of one billion nucleotides; abbreviated gb, or gbp for gigabase pairs. The genomes for Homo sapiens and Pisum sativum are 3.2 and 4.1 gigabases, ...
genome size

genome size  

The amount of DNA in the haploid genome. It is often measured in picograms, kilobases, megabases, or gigabases when organisms the size range of eukaryotes are being considered. Prokaryotic genomes ...
Hordeum vulgare L

Hordeum vulgare L  

Barley, a cereal grain domesticated about 10,000 years ago in the fertile crescent (q.v.). It is the fourth most important cereal crop (coming after wheat, maize, and rice). Its haploid chromosome ...
Glycine max

Glycine max  

The soybean, a legume native to China. Its haploid chromosome number is 20, and its genome size is 1.1 gigabases. The bean is the source of oil used in industry and protein used in human and ...
megabase

megabase   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
24 words

...a unit of length for DNA molecules, consisting of 1 million nucleotides; abbreviated Mb, or Mbp for megabase pairs. See base pair , gigabase...

base pair

base pair   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
40 words

...pair a pair of hydrogen-bonded nitrogenous bases (one purine and one pyrimidine) that join the component strands of the DNA double helix. Abbreviated bp. See deoxyribonucleic acid , genome size , gigabase , Hoogsteen base pairs , hydrogen bond , kilobase , megabase , nucleotide pair...

Bos

Bos   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
57 words

...the genus that includes the domestic cow, B. taurus , the Brahman, B. indicus , and the yak, B. grunniens . The estimated genome size of B. taurus is 2.87 gigabases. Its haploid chromosome number is 30, and about 500 genes have been mapped. See Appendix E , Species Web Site; beef thymus , cattle (for a listing of domestic...

Glycine max

Glycine max   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
72 words

...max the soybean, a legume native to China. Its haploid chromosome number is 20, and its genome size is 1.1 gigabases. The bean is the source of oil used in industry and protein used in human and livestock consumption. The soft, cheese-like bean curd is known as tofu or tubu . The soybean is an example of a nodulating legume ( q.v .). See Appendix A , Plantae , Tracheophyta, Angiospermae, Dicotyledoneae, Leguminales; Appendix E , Rhizobium...

Hordeum vulgare L

Hordeum vulgare L   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
75 words

...vulgare L barley, a cereal grain domesticated about 10,000 years ago in the fertile crescent ( q.v. ). It is the fourth most important cereal crop (coming after wheat, maize, and rice). Its haploid chromosome number is 7, and its genome size is 4.8 gigabase pairs. Malted barley is used in the brewing industry, and food-grade malts are components in the formulation of baked goods and breakfast cereals. See Appendix A , Plantae, Tracheophyta, Angiospermae, Monocotyledoneae,...

genome size

genome size   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
112 words

...daltons. One kilobase of DNA equals 1.02 x 10 –6 picograms, or 6.18 x 10 5 daltons. One picogram of double-stranded DNA equals 0.98 x 10 6 kilobases, or 6.02 x 10 11 daltons. See Appendix E , Individual Databases; Appendix F ; base pair , C value , dalton , genome , gigabase , kilobase , megabase , picogram...

potato

potato   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
108 words

...Solanum tuberosum , a tetraploid with a genome size of 1.8 gigabases. Together with corn, wheat, and rice it is one of the four most valuable of the world’s crops. Although it is called the Irish potato, S. tuberosum originated in South America. Solanum exists as two principal cultivated races designated as subspecies (ssp. andigena and ssp. tuberosum ). Both subspecies arose in South America, but ssp. andigena was the first species introduced into Europe. This cultivated race was wiped out by the potato blights of the 1840 s and was replaced by...

Triticum

Triticum   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
127 words

...D, each of which is composed of a set of seven pairs of nonhomologous chromosomes. The A and D genomes were derived from T. monococcum and T. taushii , respectively. The source of the B genome is unknown, and the donor may be extinct. The genome size for T. aestivum is 16 gigabase pairs. See Appendix A , Plantae, Monocotyledoneae, Graminales; Aegilops , durum, einkorn, emmer,...

Equus

Equus   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
142 words

...France. Equus asinus , the donkey, is a close relative of the horse. The male is referred to as a jack , the female as a jenny . The donkey evolved from the African wild ass, Equus africanus . The genome size of E. caballus is estimated to be approximately 2.5–2.7 gigabases. See Appendix A , Animalia, Chordata, Mammalia, Perissodactyla; Appendix E , Species Web Site; horse (for a listing of breeds) , horse–donkey hybrids...

Genetics in Archaeology

Genetics in Archaeology   Reference library

Jason Lewis

The Oxford Companion To Archaeology (2 ed.)

Reference type:
Subject Reference
Current Version:
2012
Subject:
Archaeology
Length:
4,402 words

...the last nucleotide of each DNA strand that was coded in the reaction, and these segments can then be decoded. This procedure was a great improvement over the previous chemical-sequencing processes, but it could take over a year to read a DNA fragment one billion bases long (a gigabase) and at a high cost of $0.10 per 1000 bases (or kilobase). Genomics. The study of genetics has undergone exciting changes with the advent and development of sophisticated modern molecular biology techniques. It is becoming increasingly easy to detect and analyze even the...

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