In addition to the repair of DNA double-strand breaks, homologous recombination is a mechanism for generating genetic diversity by swapping segments of parental chromosomes. During which process does swapping occur?
(a) DNA replication
(b) DNA repair
(c) meiosis
(d) transposition
Which of the choices below correctly indicates the gene combination from the replication products of the maternal chromosome?
(a) AB and aB
(b) ab and Ab
(c) AB and Ab
(d) aB and Ab
(c)
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What are the odds a child will inherit a recessive disorder if one parent is recessive and the other is heterozygous?
a. 33% b. 75% c. 25% d. 50% e. 40%
Which of the following produces muscle tetanus?
a. low levels of acetylcholine b. high levels of creatine phosphate c. anaerobic metabolism d. repeated stimulations over short periods of times e. decreased levels of calcium
Which description illustrates the tertiary structure of a protein molecule?
a. bonding of two amino acids to form a dipeptide b. folding of a peptide chain to form an alpha helix c. association of several polypeptide chains by weak bonds d. order in which amino acids are joined in a peptide chain e. three-dimensional shape of an individual polypeptide chain
Which of the following tissue types will produce root hairs within the zone of maturation?
A. endodermis B. cortex C. vascular tissue D. epidermis