Genes A and B are on the same chromosome. The genes have alleles A and B on one homologous chromosome, and the alleles a and b on its paired homolog. How could an individual with this allele arrangement produce a gamete with a chromosome containing the alleles Ab or aB?
A. mitosis
B. fragmentation of the chromosome
C. random fertilization
D. independent assortment
E. crossing-over
E. crossing-over
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Fill in the blank(s) with the appropriate word(s).