11. Tortoiseshell cats have different alleles for fur colors on their X chromosomes, with different X chromosomes being activated in different cells, a phenomenon called O A. X-inactivation. O B. X-expression. O C. X-activation. O D. Y-inactivation.

11. Tortoiseshell cats have different alleles for fur colors on their X chromosomes, with different X chromosomes being activated in different cells, a phenomenon called O A. X-inactivation. O B. X-expression. O C. X-activation. O D. Y-inactivation.

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter10: Control Of Gene Expression

Section: Chapter Questions

Problem 3CT: Almost all calico cats (one is pictured in FIGURE 10.7B) are female. Why? B When this calico cat was...

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1. Which of the following ensures that most genes on one X chromosome are not expressed in female animal cells? a.Knockout b.Circadian rhythm c.Repressors d,X chromosome inactivation 2. Which of the following is a function of histones in the process of gene expression? a.They wrap or unwind DNA and affect which DNA regions are accessible to RNA polymerase. b.They transport mRNA to key regions in the cytoplasm. c.They bind to DNA to increase or decrease transcription. d.They modify newly transcribed mRNA sequences.
How does X inactivation contribute to a person’s phenotype? a. It controls the number and kind of genes inherited on an X chromosome. b. It determines which X chromosome is expressed in a male. c. It allows for the expression of either the maternal or the paternal X in different cells. d. It enhances the expression of Y-linked genes in males.
In fruit flies, dosage compensation is achieved bya. X-chromosome inactivation.b. doubling the expression of genes on the single X chromosome in the male.c. decreasing the expression of genes on the two X chromosomes by 50% in the female.d. all of the above.
Match the gene on the left with the gene category on the right. ERBB2 E-cadherin BRCA1 Cdk4 A. oncogene B. proto-oncogene C. low expression in invasive cells D. tumor suppressor gene
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In marsupials, X inactivation occurs exclusively to paternally derived chromosomes. Which genes will ALWAYS be expressed in this situation? A. maternal X-linked genes B. paternal X-linked genes C. maternal Y-linked genes D. paternal Y-linked genes
Last week when I mutated the SSA1 gene in yeast it made cells grow faster, but made them sensitive to temperature. SSA1 can be said to display what? a. Antagonistic hypertrophy b. Agonistic pleiotropy c. Agonistic hypertrophy d. Antagonistic pleiotropy e. Reductive pleiotropy f. Modular pleiotropy
1. Match each of the terms in the left column to the bestfitting phrase from the right column.a. epistatic interaction 1. divide the body into identical units(segments)b. regulative 2. initiated by binding of ligand todetermination receptorc. modifier screen 3. individuals with cells of more thanone genotyped. RNAi 4. the fate of early embryonic cells canbe altered by the environmente. ectopic expression 5. assign identity to body segmentsf. homeodomain 6. substance whose concentrationdetermines cell fatesg. green fluorescent 7. suppression of gene expression byprotein double-stranded RNAh. genetic mosaics 8. method for identifying pleiotropicgenesi. segmentation genes 9. a DNA-binding motif found incertain transcription factorsj. homeotic genes 10. encode proteins that accumulate inunfertilized eggs and are needed forembryo developmentk. morphogen 11. double mutant has phenotype of oneof the two mutantsl. maternal effect 12. a gene is turned on in an inappropriategenes tissue or at…
Developing B cells that fail to make productive D to J heavy-chain rearrangements on both homologous chromosomes a. die by apoptosis in the bone marrow b. will rearrange heavy-chain loci multiple times until a productive rearrangement is made c. undergo clonal proliferation d. upregulate expression of transcription factors E2A and EBF e. fail to rearrange V to DJ.
36. the diploid somatic nucleus of xenopus has 900 copies of rDNA and in the mature oocyte it could reach up to 2M copies a. pre-transcriptional controlb. transcriptional controlc. translational controld. post-translational control v
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