The probability of obtaining a dominant phenotype from self-fertilization of a heterozygous individual is
A. 25%
B. 50%
C. 75%
D. 100%
C. 75%
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In order to distinguish between individuals, DNA genotyping (DNA profiling) detects the difference in short tandem repeats:
A. on unique genes, for example histones (H1A). B. on a single chromosome, the repeats being approximately 200 bp. C. on homologs, the repeats being approximately 200 bp. D. on a single chromosome, the repeats being usually <100 bp. E. on homologs, the repeats being usually <100 bp.
The peppered moth experiment in England is an example of ________
a. mutations b. disruptive selection c. directional selection d. sexual selection e. stabilizing selection
If a sperm cell containing a defective copy of the gene on the Y chromosome that encodes testosterone fertilizes an egg, what effect will this have on the developing embryo?
a. There will be no effect so long as the X chromosome is intact. b. The cells of the embryo will undergo apoptosis early in development. c. The embryo will develop female sexual tissues and characteristics. d. Increased hair growth will begin in utero and continue until adolescence.
The addition of a competitive inhibitor slows down a particular reaction. What could be done to increase the rate of the reaction, even in the presence of the inhibitor?
A) Add more inhibitor. B) Lower the temperature of the reaction. C) Add a coenzyme. D) Add more substrate. E) Allow the reaction to reach equilibrium.