In order for a girl to inherit hemophilia A, her parents would have which genotypes?
A. XhXh and XHY
B. XHXh and XHY
C. XHXH and XHY
D. XHXh and XhY
D. XHXh and XhY
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The chemical reaction in Figure 47-2 occurs in the:a
stomach as the result of secretions from the pancreas. b. small intestine as the result of secretions from the pancreas. c. large intestine as the result of secretions from the small intestine. d. stomach as the result of secretions from the stomach. e. small intestine as the result of secretions from the liver.
Which term refers to a haploid organism that produces gametes?
a. spore b. gametophyte c. gamete d. sporophyte
Short actin filaments bind to tetramers of which protein to form the cytoskeleton of erythrocytes?
a. Myosin b. alpha-actinin c. Spectrin d. Ankyrin e. Arp2/3
Which statement best describes the basis of sensory adaptation?
A) A continuously stimulated sensory receptor triggers fewer action potentials, so stimuli sent to the brain decrease and awareness of the stimuli is diminished. B) The nerve fiber synapsed with a sensory receptor gradually returns to its baseline level of firing despite continued neurotransmitter stimulation. C) The spinal cord interneurons that receive a prolonged stimulus gradually come to ignore it. D) The thalamic centers that receive a prolonged stimulus gradually come to ignore it.