Deduce the phenotypic proportions in the progeny of the following crosses of autotetraploids. Assume that the four homologous chromosomes of any one type pair randomly two by two and that only one copy of the a+ allele is necessary for the wild-type phenotype. A. a+a+aa x aaaa B. a+aaa x aaaa C. a+aaa x a+aaa D. a+a+aa x a+aaa