What phenotypic ratios would you expect in the following, Ask an Expert

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What phenotypic ratios would you expect in the following test crosses involving autotetraploids. Assume complete dominance no matter how many recessive alleles arepresent.
(a) AAAA x aaaa
(b) AAAa x aaaa
(c) AAaa x aaaa
(d) Aaaa x aaaa

please explain :)

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