The mechanism that "breaks" the linkage between linked genes is
A) pleiotropy.
B) codominance.
C) independent assortment.
D) crossing over.
Answer: D
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A covalent chemical bond is one in which _____
A) electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged B) protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms C) outer-shell electrons of two atoms are shared so as to satisfactorily fill their respective orbitals D) outer-shell electrons of one atom are transferred to fill the inner electron shell of another atom E) electrons from the same atom, but opposite spins, are paired
State regulatory agencies that have jurisdiction over medical laboratories fall under which federal entity?
Which of the following happens first in the
PCR process?
a. repeated cycles of high and low temperatures b. mixing of DNA polymerase with template DNA, nucleotides, and primers c. DNA hybridization d. DNA synthesis e. DNA unwinds
You found the following plants growing on campus during a field trip: a small plant with a notable absence of root hairs; a short, stubby plant with an enlarged taproot; a tall annual herb with fungal strands extending from its roots; a low-growing
plant with nodules on the roots; and a woody shrub with an extensive fibrous root system. Based on this scenario, which plant is most likely a legume with nitrogen-fixing bacteria? A) The woody shrub with the fibrous root system B) The plant with the root nodules C) The plant with the enlarged taproot D) The annual herb with the fungal-root association E) The plant with no root hairs