In humans, the 22 pairs of chromosomes, which contain most of the genes that affect somatic characteristics such as hair color and skin pigmentation, are called
A) alleles.
B) heterozygous chromosomes.
C) homologous chromosomes.
D) autosomal chromosomes.
E) homozygous chromosomes.
D) autosomal chromosomes.
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A gene is best defined as _________________.
a) A segment of a chromosome that allows for DNA replication. b) a segment of DNA that carries instructions for the production of one polypeptide chain. c) A segment of a protein that directs the production of RNA. d) A segment of DNA that carries instructions for the product of a lipid.
Valves are important for promoting one-way flow of blood through the heart and some large veins
Indicate whether the statement is true or false.
Metabolic acidosis caused by excessive blood levels of ketones is one of the harmful consequences of untreated type 1 (insulin-dependent) diabetes
Indicate whether the statement is true or false.
Of the muscles listed, which is the only one not innervated by the pudendal nerve?
A. External anal sphincter B. Coccygeus C. Iliococcygeus D. Pubococcygeus E. Puborectalis