6. Fragile-X syndrome A. is a result of a point mutation in the reading frame of

Question

6. Fragile-X syndrome A. is a result of a point mutation in the reading frame of the FMR1 gene. B. is a result of a mutant form of the FMR1 protein. C. is phenotypically evident in heterozygous females. D. results from an increase in the number of repeated CGG triplets in the promoter region of the FMR1 gene. E. becomes less phenotypically evident in later generations. 7. Phenylketonuria A. is not a genetic disorder. B. is detected by analysis for phenylalanine in a blood sample. C. is detected in newborns humans by DNA analysis. D. results from a mutation in the promoter region of a gene. E. causes mental retardation even if diagnosed soon after birth. 8. Mutations A. are always deleterious. B. can arise from errors in DNA replication. C. are always caused by mutagens. D. occur at the same rate for all bases. E. are of no importance to evolution. 9. In multicellular organisms A. somatic mutations are passed on to offspring produced by sexual reproduction. B. somatic mutations may be passed to daughter cells by mitosis. C. all mutations produce phenotypic changes. D. meiosis is not required for the transmission of germ line mutations to the next generation. E. all mutations are point mutations. 10. A nonsense mutation A. is a result of a change in a codon for an amino acid in a protein to a stop codon. B. results in a shorter mRNA transcript of the gene. C. results in a protein that is truncated from the N-terminal end. D. would likely not affect the activity of a protein. E. would not affect the primary structure of a protein.

Explanation / Answer

c d e a b

Related Questions

Navigate

• Browse (All)
• Browse 6
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.