How many proteins are present in the extract from the individual that is homozygous dominant?
a. 5
b. 6
c. 7
d. 8
d
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Soon after the introduction of antibiotics, resistant strains of bacteria that could grow in the presence of particular antibiotics began to evolve. Researchers develop new antibiotics, only to see resistant bacterial strains evolve within a few years. Which of the following explains why resistant strains of bacteria can evolve so quickly?
A. Bacteria have a short generation time. B. Bacteria can transfer plasmids containing resistance genes via conjugation. C. Horizontal gene transfer. D. Bacteria have a short generation time and can transfer plasmids containing resistance genes via conjugation. E. Bacteria have a short generation time and can transfer plasmids containing resistance genes by horizontal gene transfer mechanisms such as conjugation.
If a diploid organism has a genome consisting of four pairs of homologous chromosomes, it can produce ____
different combinations of maternal and paternal chromosomes in gametes (disregarding crossing over). a. 4 b. 8 c. 12 d. 16 e. 32
Where within the nervous system do cells determine the exact nature of an odor sensation?
a. nasal passages b. nasal epithelium c. olfactory bulb d. thalamus e. cerebral cortex
Mendel studied what he called characters and traits. What terms do we use today that have the same meaning?
a. alleles and genes b. homozygous and heterozygous c. diploid and haploid d. genotype and phenotype