The functional unit of mutation is [JIPMER 1994; MP PMT 1994; AFMC 1995]
A) Gene
B) Muton
C) Recon
D) Cistron
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correct answer is B.
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the correct answer is B because
Benzer (1962) coined the term mutan to denote the smallest unit of chromosome that undergoes mutational changes. Hence, mutan may be defined as 'the smallest unit of DNA which may be changed in the nudeotide. Thus, changes at nucleotide level are possible (Fig. 2.6C). The smallest unit of mutan is the nucleotide. Therefore, cistron is largest unit in size followed by recon and mutan. This can be explained that a gene consists of several cistron, a cistron contains many recon, and a recon a number of mutans. However, if the size of a recon is equal to mutan, there would be no possibility in recon for consisting of several mutans.
Benzer (1962) coined the term mutan to denote the smallest unit of chromosome that undergoes mutational changes. Hence, mutan may be defined as 'the smallest unit of DNA which may be changed in the nudeotide. Thus, changes at nucleotide level are possible (Fig. 2.6C). The smallest unit of mutan is the nucleotide. Therefore, cistron is largest unit in size followed by recon and mutan. This can be explained that a gene consists of several cistron, a cistron contains many recon, and a recon a number of mutans. However, if the size of a recon is equal to mutan, there would be no possibility in recon for consisting of several mutans.
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