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if two green tobacco plants cross and have green seedlings and white ceilings in green as...

if two green tobacco plants cross and have green seedlings and white ceilings in green as a dominant trait (A=green, a=white) then the parents must have what genotype?
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Answer #1

Test-cross: It is a method that used to test the individual genotype by crossing the individual known genotype.Test cross is used to identify or test that the individual offspring is a homozygous or heterozygous,some times it is also helpful for determing the individual genotype and phenotype.

From that above test-cross we can assume that the genotype of the parent plant may be two types-

a. (Aa X Aa) : both are heterozygous.

b. (AA X Aa) : one is homozygous and another is heterozygous.

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