When crossing CC (homozygous dominant) with Cc (heterozygous), the possible genotypes of the offspring are:
CC (from C and C)
Cc (from C and c)
The genotype distribution is:
CC: 50% (or 1/2)
Cc: 50% (or 1/2)
So, the proportion of homozygous dominant (CC) offspring is 1/2.
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