In the experiment by Davis et al., only fibroblast cells that took up the cloned myoD gene differentiated into muscle cells. This is because
A. myoD is the gene for myosin and the presence of myosin converts the fibroblast into a muscle cell.
B. MyoD is a transcription factor that shut off fibroblast specific genes, allowing the muscle cell characteristics to show up.
C. only those cells contained muscle-cell-specific enhancer sequences.
D. MyoA and MyoH are transcription factors that shut off muscle-specific genes.
E. MyoD is a transcription factor that turned on muscle-specific genes such as myosin.
Answer: E
You might also like to view...
Color blindness is an X-linked recessive gene. Two
normal-vision parents produce a color-blind child. (a) Is this child male or female? (b) What are the genotypes of the parents? (c) What are the chances that their next child will be a color-blind daughter? What will be an ideal response?
If heterochromatic spreading does not reach the new location of the w+ gene, and so the gene remains in the euchromatic region, what phenotype will the cells have?
What will be an ideal response?
Hansen’s rule is a mathematical model dealing with altruism. Indicate whether the statement is true or false
At what location does the filtrate leave the blood?
a. peritubular capillaries b. afferent arteriole c. efferent arteriole d. glomerulus