Multiple Choice
Independent assortment of chromosomes during meiosis is a result of:
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3. Extensions to Mendelian Inheritance
Understanding Independent Assortment
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In DNA, guanine always forms hydrogen bonds with which of the following bases?
A
Adenine
B
Uracil
C
Thymine
D
Cytosine
Verified step by step guidance1
Recall the base pairing rules in DNA, which describe how nitrogenous bases pair with each other through hydrogen bonds.
Identify that DNA bases are adenine (A), thymine (T), guanine (G), and cytosine (C), while uracil (U) is found only in RNA.
Remember that adenine pairs with thymine via two hydrogen bonds, and guanine pairs with cytosine via three hydrogen bonds.
Understand that guanine does not pair with adenine, thymine, or uracil in DNA because their structures do not allow stable hydrogen bonding with guanine.
Conclude that guanine always forms hydrogen bonds with cytosine in DNA, following the complementary base pairing rule.
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