Hemophilia is an X-linked recessive trait in humans. If phenotypically normal parents have children without hemophilia, what information could be determined by a pedigree analysis?
A) Neither parent carries the hemophiliac allele.
B) None of their children is a carrier of the hemophilia allele.
C) None of their children could have hemophiliac children.
D) The exact genotypes of the parents or children
D
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Quorum sensing
A. is used by bacteria to sense the density of cells. B. involves the production and monitoring of the amount of homoserine lactone present. C. is used by bacteria to limit the density of bacteria. D. is used by eukaryotes to sense the presence of bacteria. E. is used by bacteria to sense the density of cells AND involves the production and monitoring of the amount of homoserine lactone present.
Most of the following species are invasive exotics. Select the exception
a. Atlantic cod b. kudzu c. starlings d. hemlock wooly adelgid e. Africanized honeybee
The presence of a mutualist might allow what to happen in terms of population dynamics?
A) The species could surpass its carrying capacity. B) The growth rate would decrease. C) The competition coefficient would become negative. D) N would go to 0.
The types of bonds linking nucleotides in nucleic acids are
A. nonpolar covalent bonds. B. phosphodiester bonds. C. peptide bonds. D. ionic bonds.