Which of the following is an example of autonomous specification? O Multiple Drosophila nuclei division without cellularization of blastomeres Destroying one half of a 2 cell stage Xenopus embryo and subsequent loss of half the embryological structures O Differentiation concentration of paracrine factors within the embryo cytoplasm Separation of sea urchin blastomeres resulting in individual pluteus larva development

Which of the following is an example of autonomous specification? O Multiple Drosophila nuclei division without cellularization of blastomeres Destroying one half of a 2 cell stage Xenopus embryo and subsequent loss of half the embryological structures O Differentiation concentration of paracrine factors within the embryo cytoplasm Separation of sea urchin blastomeres resulting in individual pluteus larva development

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter33: Plant Structure, Growth, And Development

Section: Chapter Questions

Problem 10TYU: Cell differentiation occurs through _______________, whereas morphogenesis involves _______________....

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The anteriorposterior axis of a Drosophila embryo is first established by certain (a) homeotic genes (b) maternal effect genes (c) segmentation genes (d) proto-oncogenes (e) pairrule genes
The mechanism that leads directly to morphogenesis is (a) differential gene expression (b) pattern formation (c) nuclear equivalence (d) cell differentiation (e) cell determination
_______ segregate during ______. a. Homologues; mitosis b. Genes on one chromosome; meiosis c. Homologues; meiosis d. Genes on one chromosome; mitosis
Gene expression does not vary by ___ . a. cell type b. extracellular conditions c. stage of development d. the genetic rode
Which of the following statements is incorrect? a. Some gene expression patterns can be passed to an individual's offspring. b. Expression of a master regulator triggers a gene express.ion cascade. c. X chromosome inactivation is necessary for normal development of male mammals.
Figure 10.6 Which of the following is the correct order of events in mitosis? Sister chromatids line up at the metaphase plate. The kinetochore becomes attached to the mitotic spindle. The nucleus reforms and the cell divides. Cohesin proteins break down and the sister chromatids separate. The kinetochore becomes attached to the mitotic spindle. Cohesin proteins break down and the sister chromatids separate. Sister chromatids line up at the metaphase plate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the cohesin proteins. Sister chromatids line up at the metaphase plate. The kinetochore breaks down and the sister chromatids separate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the mitotic spindle. Sister chromatids line up at the metaphase plate. Cohesin proteins break down and the sister chromatids separate. The nucleus reforms and the cell divides.
S. Chromosomes are duplicated during what stage of the cell cycle? G1 phase S phase prophase prometaphase
Gene expression does not vary by ________. a. cell type c. stage of development b. extracellular conditions d. the genetic code
Which of the following statements about cell cycle regulators is incorrect? a. The concentrations of cyclins change throughout the cell cycle. b. Cyclins are present in all stages of the cell cycle except S. c. Cyclin-Cdk complexes phosphorylate target proteins. d. Cdks combine with cyclin to move the cycle into mitosis. e. During anaphase of mitosis, cyclin is degraded, allowing mitosis to end.
_________ is the gene-guided process by which cells in different locations in the embryo become specialized. a. Implantation b. Neurulation c. Cell differentiation d. Morphogenesis
Describe the critical events of mitosis that are responsible for ensuring that each daughter cell receives a full set of chromosomes from the parent cell.
Fragile-X syndrome causes the most common form of inherited intellectual disability. What is the chromosomal abnormality associated with this disorder? What is the phenotype of this disorder?