Steven has the dominant tongue rolling phenotype but he does not know his genotype. His wife has the recessive non-tongue rolling trait. If their son cannot roll his tongue this means ________
A) Steven has a heterozygous genotype
B) that it is impossible to tell Steven's genotype from this information alone
C) Steven has a homozygous dominant genotype
D) Steven has a homozygous recessive genotype
A
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Two muscles of mastication are the ________ and ________.
A. masseter; buccinator B. masseter; temporalis C. masseter; platysma D. masseter; zygomaticus
What is the primary function of wave summation?
A) increase muscle tension B) prevent muscle relaxation C) prevent muscle fatigue D) produce smooth, continuous muscle contraction
Which is one of the major inhibitory neurotransmitters in the CNS?
A. Glutamate B. Gamma-aminobutyric acid (GABA) C. Beta-endorphin D. Norepinephrine E. Dopamine
Sister chromatids ___________.
A) contain twice the normal amount of DNA. B) are found in cells called primary gametes. C) are found in cells called primary gametes, contain twice the normal amount of DNA, and occur during ovum formation. D) are found in cells called primary gametes and contain twice the normal amount of DNA. E) occur during ovum formation.