Which abnormal chromosomal condition is tolerated best in humans?
a. trisomy
b. polyploidy
c. monosomy
Ans: a. trisomy
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According to the biological species concept, two groups of organisms that are unable to form fertile, viable hybrids are considered to be different
A. races. B. species. C. kingdoms. D. hybrids. E. cohabitants.
Which type of epidemic usually results from a single contaminated source such as food?
A. Herd B. Sporadic C. Common-source D. Propagated
Each tRNA has an __________ that base-pairs with a codon, and each binds to the kind of amino acid
specified by the codon. Fill in the blank(s) with the appropriate word(s).
A homozygous dominant parent will produce
a. one type of gamete with this one homozygous allele. b. two types of gamete with this one homozygous allele. c. a mixture of gametes with both homozygous and recessive alleles. d. a single gamete with a single mutant allele. e. none of these.