A duplication is: A. an exchange between non-homologous chromosomes, resulting i

Question

A duplication is: A. an exchange between non-homologous chromosomes, resulting in chromosomes with new genes adjacent to each other. B. loss of genes in part of a chromosome C. an extra copy of the genes on part of a chromosome D. a reversal of order of genes on a chromosome E. an extra set of chromosomes in an organism. Which of the following sequences in double-stranded DNA is most likely to be recognized as a cutting site for a restriction enzyme? A. 5'-AAGG-3' 3'-TTCC-5' B. 5'-AGTC-3' 5'-TCAG-5 C. 5'-GGCC-3 3'-CCGG-5' D. 5'-ACCA-3' 3'-TGGT-5' E. 5'-AAAA-3' 3'-TTTT-5' A mutation in a codon leads to the substitution of one amino acid with another. What is the name for this type of mutation? A. Nonsense Mutation B. Missense Mutation C. Frameshift Mutation promoter mutation D. Promoter Mutation E. Silent Mutation

Explanation / Answer

3. C. An extra copy of genes on part of a chromosome

4. Option C is correct answer.

5. B. Missense mutation.

missense mutation is a point mutation in which a single nucleotide change results in a codon that codes for a different amino acid. It is a type of nonsynonymous substitution.

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