24. Which of the following is NOT a way in which transposable elements are thoug
ID: 276639 • Letter: 2
Question
24. Which of the following is NOT a way in which transposable elements are thought to contribute to evolution? a. b. c. d. e. They can facilitate recombination between chromosomes. They can insert into a protein-coding sequence and change its expression. They can cause duplications of entire chromosomes. They can carry entire genes with them to a new position in the genome. They take individual exons with them during transposition. 25. Epigenetic regulation of gene expression is determined by: a. b. c. d. e. The nucleotide sequence of the gene's promoter DNA methylation Packaging of DNA into chromatin Histone modification All but A 26. A mutation occurs during meiosis. What is the least likely outcome for the resultant offspring containing this mutated allele? a. The mutation is neutral: it has no discernable fitness effect b. The mutation is lethal: the offspring does not survive c. The mutation is advantageous: the offspring has higher fitness than the parent. d. The mutation is somewhat deleterious: the offspring has lower fitness than the parent but does not die outright.Explanation / Answer
24) option C. they can cause duplication of entire chromosomes.
they facilitate recombination via homologous recombination.
they insert into gene and change its expression.
they can carry a gene to a new position in the genome.
they also take exons with them and may create a new combination of exons.
25) option E. All but A.
the gene expression depends on promoter sequence. if the promoter is strong more expression of the gene will observe.
also the methylation of nucleotides and histone modification like acetylation and deacetylation also affect the gene expression.
packing of DNA also alters the expression of the gene. like Euchromatin and Heterochromatin.
26) option D.
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