Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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An individual has a mutation in the gene that codes for the pigment melanin that results in white skin and hair. Choose the correct explanation for how this mutation affects this individual's traits.
Question 11 options:
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The error in the DNA sequence results in an error in the mRNA molecule during transcription, the error in the mRNA molecule results in an incorrect amino acid in the melanin protein which makes it non-functional. The resulting trait is hair and skin without color. |
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The error in the mRNA sequence results in an error in the DNA molecule during transcription, the error in the DNA molecule results in an incorrect |
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The error in the DNA sequence results in an error in the mRNA molecule during transcription, the error in the mRNA molecule results in an incorrect nucleic acid in the melanin protein which makes it non-functional. The resulting trait is hair and skin without color. |
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The error in the mRNA sequence results in an error in the DNA molecule during transcription, the error in the DNA molecule results in an incorrect amino acid in the melanin protein which makes it non-functional. The resulting trait is hair and skin without color. |
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- True/False questions Promoter is a protein that regulates transcription. True/False Bacterial genes are almost always part of operons. True/False RNA polymerase cannot bind to the promoter when repressor is bound to the operator. True/False Proteins are polymers of amino acids connected by phosphodiester bonds. True/False First amino acid of any protein is always methionine. True/Falsearrow_forwardThe diagram shown represents the coding strand of the myosin gene. Mutations in myosin can lead to muscle defects during development. Using what you know about how mutations can affect transcriptional and post-transcriptional regulation, match the results shown on the Northern (mature mRNA) to the mutations shown. The N lane shows the size and amount expected for non-mutated myosin mRNA. All samples were loaded at the top (-) side of the gel. Part 1. Which lane or lanes on the gel could be the result of mutation A? ТАТА AUG UAA Only known regulatory region TSS Mutation B: Mutation C. 3 nucleotides 20 nucleotides deleted A: 5-base deletion changed 1 2 4 5 lane 1 lane 2 lane 3 lane 4 lane 5 OOO0Oarrow_forwardWhich of the following mutations in the protein-coding region of a gene is more likely to lead to complete loss of function of the encoded protein: an insertion of six nucleotides or a deletion of two nucleotides? Briefly explain your answer.arrow_forward
- Haemochromatosis is a recessive disorder caused by mutations in the HFE gene. The disorder can be the result of nonfunctional HFE protein, or from very low levels (expression) of the HFE protein. Below is a northern blot gel showing the amount and size of HFE mRNA for a person who does not have haemochromatosis (WT). The mRNA was loaded at the top of the gel. WT A B C D Position the bands on the gel shown in each question as directed. Part 1 Tom has a mutation which changes the sequence of an enhancer region adjacent to the TATAA box for this gene. Position Tom's band in Lane A. WT A B 00arrow_forwardLine A below shows the peptide synthesized after transcription and translation of a piece of DNA. Line B shows the peptide synthesized after a mutation in this piece of DNA. proline- arginine - aspartic acid - lysine - glycine proline - glutamine - aspartic acid - lysine — glycine The type of change in the DNA most likely to be responsible for the difference between the peptides is: a. A frame-shift mutation d. A base deletion b. A base insertion e. A silent mutation f. A base substitutionarrow_forward
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