Figure 21.5: In paramutation at the
b1
locus in corn, a copy of the
B
′ allele converts the
B-I
allele to
B
′*, which has the same phenotype as
B
′.
The
B-I B-I
genotype produces a pigmented plant, while
B
′
B
′ and
B
′
B
′* genotypes are lightly pigmented.
