What does a large haplotype block suggest about a genomic region?
What will be an ideal response?
A large haplotype block usually indicates a recent origin, because the older a block, the greater the chances that it would have undergone genetic recombination at some point in the past. It may also suggest that some mutation within the haplotype block imparted a fitness advantage and has therefore been selected for (positive selection).
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Osmoregulation is best defined as:
A. the control of osmotic pressure through regulation of water and solute levels. B. the movement of water from areas of lower solute concentration to areas of higher solute concentration. C. the difference in solute concentration on the two sides of a membrane. D. the movement of water through aquaporins. E. the regulation of membrane permeability.
The greater fitness seen in species that reproduce sexually can be contributed to what?
a. Sexually reproducing species are typically born into stable environments so have greater fitness. b. Fewer offspring are born, so more care can be given to each offspring. c. Genetic diversity is created through sexual reproduction. d. Sexual reproduction has greater energy requirements. n
All of the following pertain to nitrogenous bases except
A. guanine pairs with uracil. B. they allow variation from one nucleotide to another which creates the encoded information. C. cytosine and thymine are pyrimidines. D. they form pairs by hydrogen bonding. E. adenine pairs with thymine.
Mammalian genomes all have a number of genes for globin polypeptides. Several of these genes are functional, but several are never expressed. What are the nonfunctional ones known as?
What will be an ideal response?