The dialectic discourse of the 'gene' as the unit of heredity deduced from the phenotype, whether an intervening variable or a hypothetical construct, appeared to be settled with the presentation of the molecular model of DNA: the gene was reduced to a sequence of DNA that is transcribed into...
DNA:DNA (deoxyribose nucleic acid) is a polymer of nucleotides that features an organism's genetic information. It exists as two complementary, anti-parallel strands that form a double helix.Answer and Explanation: (a) A gene is a sequence of nucleotides on one strand of the DNA doubl...
Unit 2 what is a gene基因是什么 Unit2Whatisagene?“Gene”的妙译★Gene[dʒi:n]:基因。★译者：摩尔根的弟子谈家桢院士。★妙处：兼顾语音和词义。Definition1860s–1900s:Geneasadiscreteunitofheredity Theconceptofthe―gene‖hasevolvedandbecomemorecomplexsinceitwasfirstproposed.Therearevariousdefinitionsof...
Why is the DNA Sequence of a gene not equivalent to the RNA sequence of the same gene in eukaryotes? What processes generate these differences? Nucleic Acid Molecules: The examples we know or we have for nucleic acid molecules...
"Gene editing" is a type of genetic engineering in which DNA is inserted, deleted or replaced in the genome of an organism. Which of the following is a proper description of gene editing? A. It is completely safe and has no ethical issues. B. It can only be used on plants, not on...
The idea of genes as beads on a DNA string is fast fading. Protein-coding sequences have no clear beginning or end and RNA is a key part of the information package, reports Helen Pearson. The genetic code ‘cracked’,protein synthesis ‘solved’ and comp
One of the most reliable ways to find out what a gene is for is to find another gene with a very similar sequence. The human genes for hemoglobin and the chimpanzee genes for hemoglobin are a case in point. Since our ancestors diverged about six million years ago, the genes in each lin...
A. The whole DNA sequence responsible for synthesis of a functional protein or RNA molecule. B. Polynucleotide sequence of DNA molecule that contains specific genetic information. C. The minimal functional unit of genetic material. D. The gene sequence consists of continuously arranged triplet codes...
Since the sequence of bases carries the instructions for making proteins and also regulates gene functions, the ability to read genetic sequences is enormously valuable to biological research. Because differences in DNA and RNA sequences can distinguish organisms down to species an...
In the early part of the twentieth century, scientists knew whatgenesdid, but they did not know what they were. Francis Crick, one of the codiscoverers of the three-dimensional double helical structure ofDNA, was among the first to propose that a gene was alinearsequence of nucleotides and...