The ____ nervous system consists of the brain and spinal cord and the ____ nervous system consists of nerves.
A. sensory; motor
B. central; peripheral
C. peripheral; sensory
D. sensory; central
B. central; peripheral
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The genes for ABO blood typing are IA, IB, and Ii; the superscripts indicate that _____.
A) three separate loci are associated with this trait B) the genes are incompletely dominant C) the genes for blood typing form a linkage group D) the locus has multiple alleles E) ABO blood typing results from epistatic interactions
A. When a mutation arises, it can have three possible consequences: beneficial to the individual, selectively neutral, or detrimental. Order these from most likely to least likely
B. The spread of a mutation in subsequent generations will, of course, depend on its consequences to individuals that inherit it. Order the three possibilities in part A to indicate which is most likely to spread and become overrepresented in subsequent generations, and which is most likely to become underrepresented or disappear from the population.
Cliff has colorblindness and icthyosis, which causes scaly skin. Both traits are X-linked recessive. The probability that he transmits both traits to his sons is
A) 0 B) 1/4 C) 1/2 D) 3/4