What is the probability that an individual heterozygous for a cleft chin (Cc) and an individual homozygous for a chin without a cleft (cc) will produce offspring that are homozygous recessive for a chin without a cleft (cc)?

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Answer 1 · 2015-10-25T19:51:37

1/2

Here the parental genotype are : Cc and cc
The genes are therefore : C c c c
Hence, if you draw a punnet's square, it would appear like this

 C  | c

c|Cc cc
c|Cc cc

Hence it stands that Cc : cc =2:2
Thus the probability is 1/2