Aneuploid human embryos are least likely to survive except those involving:
A) chromosome 6, 7, 8, 9, 10.
B) chromosome 1, 2, 3, 4, 5.
C) chromosome 1, 2, 3, X, Y.
D) chromosome 11, 12, 14, 15.
E) chromosome 13, 18, 21, X, Y.
Answer: E
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Many species of gulls feed their chicks by regurgitating food. When parents return from foraging, the gull chicks peck at a red spot on the parent's bill, which causes the parents to open the bill and regurgitate their food
Chicks will peck at a red dot painted on any long, slender object. For the chicks, pecking is a ____ and the red dot is a ____ . For the adult gulls, the chicks pecking at their bills is a ____ and regurgitating food is a ____ . Fill in the blank with the appropriate word.
Which of the following statements about an animal bearing a somatic mutation is TRUE?
A. Some, but not all, of the animal's offspring will also carry the mutation. B. All of the animal's offspring will carry the mutation. C. The animal but not its offspring can be affected by the mutation. D. The gametes produced by the animal will all carry the mutation. E. Both the animal and its offspring will show the mutant trait.
Recognition sequences for restriction enzymes possess the unique quality of being the same when read 5? to 3? on either strand. What is this property called?
A) origin sequence B) consensus sequence C) gene sequence D) recombination sequence E) palindromic sequence
Consider the following two half reactions:NAD+ + H+ + 2e? ? NADH Eo (volts) = ? 0.32Pyruvate? + 2H+ + 2e? ? lactate 2? Eo(volts) = ? 0.19In a redox reaction involving NAD/NADH and pyruvate, ________ will be the electron donor and ________ will be the electron acceptor.
A. NAD+; pyruvate B. lactate; pyruvate C. NADH; pyruvate D. pyrvuate; lactate