Genetic map units represent ____
a. absolute physical distances between genes
b. locations of different alleles of a gene
c. the chromosome on which a given gene is located
d. the actual DNA sequence of a gene
e. relative positions of genes with respect to one another
ANSWER: e
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The molecule that carries each amino acid to its correct position along mRNA in the cytoplasm is
A. tRNA. B. mRNA. C. ATP. D. ribosomal RNA.
Identify the reactants in the following chemical reaction: C10H8 + 12 O2 ? 10 CO2 + 4 H2O
A. 12 O2 and 4 H2O B. C10H8 and 12 O2 C. C10H8 and 10 CO2 D. 10 CO2 and 4 H2O
Natural selection operates directly on
(a) the genotype. (b) individual alleles. (c) the phenotype. (d) color only.
Monozygotic twin concordance values are less than 100% in both bipolar disorder and schizophrenia. This suggests that these disorders ____
a. are strictly polygenic b. have environmental components c. are X-linked d. genetically dominant e. are not genetically based