Human eye color is the result of
A) polygenic inheritance.
B) sex-linked recessive inheritance.
C) codominance.
D) genes and environmental effects.
E) simple dominance.
A
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Which of the following is an example of how “maximum likelihood” is used by systematists
a. using the simplest explanation necessary to interpret the data b. assigning humans and chimpanzees to a less inclusive taxon c. using probability to determine that the nucleotide sequences in DNA and RNA change at a constant rate over time d. establishing the membership in a clade using the phenetic approach e. distinguishing shared ancestral characteristics and shared derived characters
What enzyme separates strands of DNA during DNA replication to make DNA single- stranded so it can be copied?
A) DNA primase B) DNA polymerase C) DNA helicase D) DNA ligase E) Reverse transcriptase
Histone variants:
A. have been identified for H2B and H4 but not for H2A and H3. B. differ in their C-terminal sequences but not in their N-terminal sequences. C. that have been identified are associated with transcriptional activation only. D. have variant patterns of modifications as a result of the structural differences in their terminal sequences. E. have been found to affect all cellular processes that involve DNA except DNA repair.
Which of the following compounds helps to
maintain our blood pH between 7.35 and 7.45?
a. water b. carbonic acid c. hydrocloric acid d. hydrogen peroxide e. sodium hydroxide