Which of the following statements best describes the outcome of a mutation? a. A mutation always results in a mutant genotype b. A mutation always results in a mutant karyotype c. A mutation always results in a mutant phenotype d. A mutation always results in a mutant protein
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Which of the following statements best describes the outcome of a mutation?
a. A mutation always results in a mutant genotype
b. A mutation always results in a mutant karyotype
c. A mutation always results in a mutant
phenotype d. A mutation always results in a mutant protein
Step by step
Solved in 3 steps
- Which of the following terms refer to the case when a mutation results in a significant decrease or a complete loss of the functional activity of a gene product? a. gain-of-function mutation b. loss-of-function mutationThe basic units of information that encode the proteins needed to grow and function as a living organism are called: Select one: a. Chromosomes O b. Genes c. Mutations O d. Cells O e. Mendel's postulatesDefine the following terms: a. point mutation b. transition mutation c. transverse mutation d. silent mutation e. missense mutation
- Sickle cell anemia is a disease caused by a mutation at the genotypic level. A person with two copies of the gene has the disease, but a person with one copy of the gene does not have the disease. The diagram shows how this mutation affects an organism. Use the image to answer the question. The mutation causes the deformity of the red blood cell, the component of blood that carries oxygen throughout the body. The deformed cells can clump together and can clog blood vessels. The parasites responsible for the sickle cell condition are killed in the deformed red blood cells. In which type of environment would carriers of the disease be naturally selected for? A. low altitude B. high altitude C. low population of parasites D. high population of parasitesDefine the following terms:a. point mutationb. transition mutationc. transversion mutationd. silent mutatione. missense mutationWith regard to human cancer cells, which of the following statements is true? A. Cancer cells within one tumor usually do not share common mutations B. Cancer cells generally have lost the ability to divide C. Oncogenes are non-human genes not related to normal genes in the human genome D. Mutations in DNA repair genes result in an increased chance of getting cancer.
- Which of the following may be detected using a karyotype?a. point mutationsb. a specific genetic markerc. an abnormal number of chromosomesd. the location of a transposonWhich of the following types of mutations will have the most devastating effect on a cell?A.frameshift mutationB. missense mutationC. nonsense mutationD. silent mutationAt birth a child has got blue eyes, but now his/her eyes turn brown. Which of the following statements would best explain the observed phenomena? A. The child does not have brown pigment at birth B. Eye’s colour at birth is affected by mother’s gene C. Gene repressor for brown pigment produced is not yet active D. Gene activatior for brown pigment production is not yet active at birth E. All of the above statements are false
- In general, all mutations can be considered harmful, because most genetic systems are already optimized to work correctly and efficiently. A. True b. False; mutations are considered harmful only if they have a direct effect on the ability of cells to synthesize DNA c. False; some mutations are harmful, and some are considered beneficialA researcher studies a mutation that occurs in humans and writes four facts about the mutation in a chart. 1. The mutation is caused as a result of chance. 2. The mutation leads to a genetic disease. 3. The mutation occurs in sperm cells and is passed to the next generation. 4. The mutation is not discovered or fixed by the cell's enzymes. Based on the information, the researcher concludes that the mutation is harmful. Which statement best supports the researcher's conclusion? O statement 1 O statement 2 O statement 3 O statement 4 hpWhich of the following statements about genes is incorrect? Select one: O a. During fertilization, both the sperm and the ovum contribute genes to the resulting fertilized egg. b. Genetic differences can result from changes in the DNA called mutations. O c. Genes correspond to segments of DNA. d. Under normal circumstances, each chromosome contains precisely one gene. e. Many genes contain the information needed for cells to synthesize enzymes and other proteins.