Question #6423849Single Choice
Biology
Question
A cross between two heterozygous plants (Aa × Aa) is expected to produce offspring in a 3:1 ratio of dominant to recessive phenotypes. However, some offspring exhibit phenotypes consistent with aneuploidy. What is the most likely cause?
Options
A
Mutation of the dominant allele
B
Nondisjunction during gamete formation
C
Unequal crossing over during meiosis
D
Failure of fertilization in recessive gametes
Answer & Analysis
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