A chromosome’s gene sequence that was ABCDEFG
before modification and ABCDLMNOP afterward is
an example of
a. inversion.
b. deletion.
c. duplication.
d. translocation.
e. aneuploidy.
Answer: d
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The parasitic lampreys, living members of the ____ lineage, have shards of cartilage that partially cover the nerve
cord, which may represent an early stage of the evolution of vertebrae.
a. Petromyzontoidea b. Placodermi c. Cephalochordata
d. Urochordata e. Myxinoidea
Which characteristic of water molecules directly contributes to the remarkable "water walking"
success of the aquatic insects pictured in the accompanying figure?
a. hydrogen bonds
b. capillary action
c. nonpolar covalent bonds
d. ionic bonds
e. adhesive forces
Which immune system protects the body from its own cancerous cells?
A) cell-mediated immune system B) antibody-mediated immune system C) enzyme immune system D) inflammatory immune system
Suppose that an F1 dihybrid cross results in a phenotypic ratio of 9:3:4. What does this tell you?
a. The second locus is dominant over the first locus. b. Dominance is incomplete at the second locus. c. Epistasis is occurring. d. Codominance is at the second locus.