In maize plants, seed colour is determined by Gene A, whilst seed texture is determined by Gene B. The dominant allele A codes for purple seed colour whereas the recessive allele codes for yellow seed colour. The dominant allele B codes for smooth seeds whilst the recessive allele b codes for wrinkled seeds. An inter-cross between two maize plants produced the following offspring:

Table 1: Progeny phenotype and number

Phenotype                                               Number
Purple and smooth                                     216
Purple and wrinkled                                   79
Yellow and smooth                                     65
Yellow and wrinkled                                    21
Total of                                                       381

(a) Explain why yellow, wrinkled seeds will breed true.
(b) Draw a genetic diagram to explain these results.
(c) Use Chi-square analysis to determine whether seed color and seed texture exhibit independent
assortment.