Kernel colour in corn is a trait determined by two alleles. The dominant allele 
produces a purple colour and the recessive allele ( p ) produces a yellow colour. By crossing two plants, an ear of corn is produced. The kernels are purple and yellow coloured. The yellow kernels can be best described as
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It is given that the dominant allele 
produces a purple colour and the recessive allele (p) produces a yellow colour. Thus, the phenotype of purple colour kernels will be PP (homozygous dominant) and Pp (heterozygous dominant). The phenotype of yellow colour kernels will be pp (homozygous recessive)
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