when seeds form a cross b/w 2 plants of a certain species were germinated, they produced the following plants:-

30 tall plants with red fruits 20 dwarf plants with red fruits . it was shown that both tallness and red color were dominant characters in this plant but the genotypes of the parents of the corss were not known. explain why this results was obtained?

At least one of the member is homozygous dominant for the colour. And for the tallness, one is heterozygous tall and anther is homozygous dwarf. Then only this ratio can be achieved.

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