In a polygenic trait
A) within genes, all alleles affect the phenotype to the same degree.
B) all alleles are dominant.
C) genes contribute to varying degrees, and alleles have differing degrees of impact.
D) one gene can cancel out the effect of the environment.
C) genes contribute to varying degrees, and alleles have differing degrees of impact.
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Which of the following organ systems is involved with sensory communication and
integration of all organ systems?
a. nervous system b. endocrine system c. lymphatic system d. respiratory sys
In 2006, the U.S. generated __________ tons of
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