Is there a risk for epigenetic linked diseases in using artificial reproductive technologies (ART) such as in vitro fertilization?
What will be an ideal response?
Yes. There is an increase in imprinting errors, and maternal specific methylation is reduced when using ART. Some examples are an increase in Beckwith—Wiedemann syndrome, Angelman syndrome, and Prader-Willi syndrome.
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Which of the following does NOT have an effect on the amount of muscle tension that results from a muscle contraction?
a. the size of the motor units in the muscle b. how frequently the motor units are stimulated c. the type of bone to which the muscle is attached d. the number of motor units active at one time
Plants and streptophyte algae share a number of derived traits, except
A. plasmodesmata. B. sexual reproduction. C. chlorophyll a and b. D. a distinctive type of cytokinesis. E. cellulose-rich cell walls.
. A fetus born earlier than ___ weeks is
considered premature. a. 22 b. 26 c. 30 d. 33 e. 37
The transport of fluids and very minute particles is known as