Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Which of the following statements concerning genes are true? Select all that apply.
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A gene is a segment of DNA that determines a certain trait.A gene is a segment of DNA that determines a certain trait.
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An allele is a variation of a given gene.
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Genes contain information that codes only for proteins involved in the regulation of gene expression.Genes contain information that codes only for proteins involved in the regulation of gene expression.
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Genes are not responsible for the expression of traits.Genes are not responsible for the expression of traits.
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Allele variations are due to small changes in the
nucleotide sequence within the gene that sometimes change the structure of a protein and ultimately its function.Allele variations are due to small changes in the nucleotide sequence within the gene that sometimes change the structure of a protein and ultimately its function.
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- Differential gene expression describes how... (Choose the answer the best illustrates the definition of differential gene expression.) O each cell in your body expresses only a subset of its genes. O every cell in your body expresses all its genes, but at different times. every cell in your body expresses only a subset of its genes, but all these cells express the same subset of genes. different cells in your body express different subsets of genes.arrow_forwardChoose the statement that correctly characterizes regulated and/or constitutive gene expression. Regulated expression refers to gene expression that is either on or off, depending on the physiological or metabolic status of the cell. Constitutive expression refers to gene expression that is either on or off, depending on the physiological or metabolic status of the cell. Constitutive expression refers to gene expression that is always repressed in response to the absence of required nutrients or other metabolic molecules. Regulated expression refers to gene expression that is always on, regardless of the metabolic or physiological conditions in the cell. Regulated and constitutive expression are terms used to describe gene expression in prokaryotes only.arrow_forwardEnvironmental factors can influence the gene expression in some organisms. a. Describe how environmental factors can affect an organism's phenotype. b. Explain how light exposure can affect gene expression in organisms of the same species. Provide an example.arrow_forward
- How can you envision using this new information? Discuss how things that we do to our bodies (smoking, recreational drugs, employment environments, stress levels, eating/drinking habits, etc.) can influence genetic expression in our future child(ren).arrow_forwardThe hairless gene allele, H, in fruit flies, causes fruit flies to lack sensory hairs. The H allele is dominant; the recessive allele, h, causes flies to have normal sensory hairs. The dominant allele is lethal when homozygous. A second gene, suppressor of Hairless, Su(H), can block the phenotype of hairless. The dominant allele, Su(H), prevents the H allele from causing its phenotype, resulting in flies with sensory hairs. The dominant Su(H) allele is also lethal when homozygous. The recessive allele, su(H), allows the H allele to cause its phenotype. The Su(H) allele does not affect with the h allele. If you crossed a normal hair fly (of genotype H h Su(H) su(H) ) with another normal hair fly (of genotype H h Su(H) su(H) ), what proportions or ratios of genotypes and phenotypes would you expect to observe in the offspring? Show your work.arrow_forward
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