Stem color of tomato plants is known to be under the genetic control of at least one pair of alleles such that A- results in the production of anthocyanin pigment (purple stem). The recessive genotype aa lacks this pigment and hence is green. The production of two locules in the tomato fruit is controlled by the dominant allele M and multiple locules is determined by mm. Give the genotype of the F1 plant produced by a cross between an inbred tomato plant that has a purple stem and fruit with two locules crossed to a tomato plant that have fruit with multiple locules and a green stem.

Genotype - AaMm

Phenotype - Heterozygous purple stem and fruit with  two locules

Explanation:

Given

Trait 1 - Recessive allele for green color stem is represented by a

and dominant allele for purple color stem is represented by  A

Trait 2 - Production of two locules in the tomato fruit is a dominant trait and is represented by "M" and production of multiple locules in the tomato fruit is a recessive trait and is represented by "m"

F1 cross is carried between tomato plant with purple stem and fruit with two locules (AAMM) and a tomato plant that have fruit with multiple locules and a green stem (aamm)

The following offspring will be produced

AM         AM         AM         AM

amAaMmAaMmAaMmAaMm

amAaMmAaMmAaMmAaMm

amAaMmAaMmAaMmAaMm

amAaMmAaMmAaMmAaMm

Genotype - AaMm

Phenotype - Heterozygous purple stem and fruit with  two locules