Based on the Classic Experiments of Creighton and McClintock with Maize,crossing

question 7

Multiple Choice

Based on the classic experiments of Creighton and McClintock with maize,crossing over involves a physical exchange between chromatids.What particular chromosomal characteristic allowed their experiments to succeed?

• A)a missing chromosome
• B)a chromosome with a unique cytological marker
• C)three chromosomes with identical structure
• D)colored bands along the lengths of a chromosome
• E)an extra chromosome

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