Hox genes encode transcription factors that a. control segmentation. b. promote determination. c. cause cell differentiation. d. do all of the above.
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Hox genes encode transcription factors that
a. control segmentation.
b. promote determination.
c. cause cell differentiation.
d. do all of the above.
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Solved in 2 steps
- Which of these processes is MOST directly involved in the resorption of a tadpole’s tail during development? A. apoptosis B. mitosis C. phagocytosis D. protein synthesisThe term differentiation refers to (a) the loss of genes from cells. (b) the acquisition of new functional capabilities by cells. (c) the production of functionally specialized cells. (d) the division of genes among different types of cells.Why is it easier to manipulate embryonic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell? a. As cells develop, signaling pathways can cause some genes to be turned off during development. b. Adult cells have different DNA content than do embryonic stem cells. c. Emybronic stem cells pose less of a threat for organ rejection as do an individual s own adult cells. d. It is no easier to manipulate emybronic stem cells to differentiate into various tissues than it is to manipulate a typical adult cell.
- What is differentiation? A. When a cell switches from its original purpose B. The process of multiplying the cells in the body C. The process by which cells become specialized in their form to aid in their function D. How cells grow once their place in the body has been decidedGene therapy is used to treat defects in__________.a) Somatic cell. b) Organ c) Tissue d) Reproductive CellThe bicoid protein in a larval fly is produced by mRNA that originally came from Group of answer choices A) tissue of some random fly that happened to be in the neighborhood B) tissue of the father fly C) larval tissue D) tissue of the mother fly
- Which gene program is described correctly? A. Cell division is the process whereby identical cells begin to specialize into specific cell types. B. Signal induction identifies important body axes such as anterior-posterior and dorsal-ventral. C. Differentiation increases the number of cells, so an organism can grow larger. D. Morphogenesis is the process whereby cells identify where they are in three-dimensional space.Which of the following is NOT an example of cell migration as a part of cell differentiation? A. Mesenchyme cells forming mesoderm during gastrulation B. Primitive streak formation in a chick embryo C. Concentration of protein complexes during cleavage D. Convergent extension to elongate the archenteron in the sea urchinIf you observed fruit flies with the following developmental abnormalities, would you guess that a mutation has occurred in a segmentation gene or a homeotic gene? Explain your guess. A. Three abdominal segments were missing. B. One abdominal segment had legs. C. A fly with the correct number of segments had two additional thoracic segments and two fewer abdominal segments.
- Muscle cells differ from nerve cells mainly because they(A) express different genes.(B) contain different genes.(C) use different genetic codes.(D) have unique ribosomes.Morphogens area. molecules that disrupt normal development.b. molecules that convey positional information and promote changesin development.c. mutagenic agents that cause apoptosis.d. receptors that allow cells to adhere to the extracellular matrix.e. both a and cWhich of the following best describes a gene that codes for a tumor-suppressor protein? a. One that helps to prevent progression through the cell cycle. b. One that helps prevent apoptosis. c. One that codes for a DNA repair enzyme. d. One that supports part of a growth factor signaling pathway.