| 单词 | junk dna |
| 释义 | junk DNAsegments of DNA that have no apparent genetic function. Origin of junk DNA1990–95 Words nearby junk DNAjunk, junk art, junk bond, junk bonds, junk call, junk DNA, junker, Junkerdom, Junkerism, Junkers, junket Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for junk DNAjunk DNA nounDNA that consists of repeated sequences of nucleotide and has no apparent function Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for junk DNA“junk” DNA Segments of DNA along a chromosome that are not genes, do not code for anything that we know of, and whose purpose we do not understand. Approximately ninety-five percent of the human genome falls into this category. The term junk may be misleading, however, as this DNA may have other functions, such as regulating genes during development. notes for “junk” DNASome scientists speculate that junk DNA may be archaic material left over from an earlier stage of evolutionary development. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Medical definitions for junk DNAjunk DNA [ jŭngk ] n.DNA that does not code for proteins or their regulation but is thought to be involved in the evolution of new genes and in gene repair, and constitutes approximately 95 percent of the human genome. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for junk DNAjunk DNA [ jŭngk ] DNA that serves no known biological purpose, such as coding for proteins or their regulation. Junk DNA makes up the vast majority of the DNA in the cells of most plants and animals, composing, for example, about 95 percent of the human genome. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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