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7. The mutation for cataracts (c) occurs on a gene represented by the letter E. Owls that are homozygous for the mutation (EcEc) exhibit cataracts. Owls that are homozygous for normal eyes are EE and owls that are carriers of the mutation but do not exhibit cataracts are EEc.
What percentage of the offspring in a cross between parents with the genotypes EE and EcEc will exhibit cataracts?

A. 0%
B. 25%
C. 50%
D. 75%

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