What region is the major control center of X inactivation in mammals?
A) NRY B) Xic C) Barr Body D) MSY E) SRY
Answer: B
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The phospholipid molecules of most membranes have a ____
a. hydrophobic head and a hydrophilic tail b. hydrophilic head and a hydrophobic tail c. hydrophobic head and two hydrophobic tails d. hydrophilic head and two hydrophobic tails e. hydrophilic head and tail
If you were working on a comatose patient suffering from extreme hypoglycemia, you would try to find the cause by asking a friend of the patient if they knew of a history of either
A. too much insulin being produced. B. too little insulin being produced. C. insufficient carbohydrate intake or too much insulin production. D. insufficient carbohydrate intake. E. insufficient carbohydrate intake or too little insulin production.
Diffusion of morphogens—products of master
genes—creates gradients that cause the differential expression of other genes such as __________, which govern the formation of specific body parts. Fill in the blank(s) with the appropriate word(s).
After four observations, Darwin made the inference that natural selection causes what process?
What will be an ideal response?