The genotypes and phenotypes that result from the cross of Aa and Aa (A = normal
pigmentation and a = albinism) are
A) phenotypes-50% normal and 50% albino; genotypes-all homozygous recessive.
B) phenotypes-50% normal and 50% albino; genotypes-50% homozygous recessive
and 50% homozygous dominant.
C) phenotypes-25% normal and 75% albino; genotypes-25% homozygous dominant
and 50% heterozygous and 25% homozygous recessive.
D) phenotypes-75% normal and 25% albino; genotypes-25% homozygous dominant
and 50% heterozygous and 25% homozygous recessive.
D
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The epiglottis covers the opening into the larynx during the ________ phase of swallowing.
A. gastric B. voluntary C. pharyngeal D. esophageal E. oral
________ are secreted by one cell into the tissue fluid, diffuse to nearby cells in the same tissue, and stimulate their physiology
A) Paracrines B) Hormones C) Neurotransmitters D) Neuromodulators E) Parahormones
The two identical cells that arise from mitosis are called ________ cells.
Fill in the blank(s) with the appropriate word(s).
Gap junctions can be found in all of the following tissues except
A) cardiac muscle. B) smooth muscle. C) skeletal muscle. D) simple columnar epithelium. E) pseudostratified columnar epithelium.