In nature, DNA recombination occurs but it is random and undirected
Indicate whether the statement is true or false
TRUE
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The term “2n” means
(a) the diploid chromosome number is present. (b) the haploid chromosome number is present. (c) chromosomes within a single nucleus exist in homologous pairs. (d) both a and c.
Humans have ____
a. more taste receptors than olfactory receptors b. more olfactory receptors than taste receptors c. a high degree of dependency on pheromones d. approximately six types of olfactory receptors e. an advanced vomeronasal organ
All of the following statements about master
genes are true EXCEPT:a. They orchestrate layers of development. b. They are highly conserved over evolutionary time. c. Mutations within these are frequently devastating. d. They are highly variable in their sequences between species. e. Mutations usually result in changes in body plan
The nearly neutral theory:
a. relaxes assumptions concerning the selective neutrality of alleles. b. can be used to explain the discrepancy between substitution rates explained by generation time and annual time. c. suggests that mildly deleterious mutations can fix more readily in smaller populations due to drift. d. A and C. e. All of the above.