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Heterozygous is a term that describes the genotype and just means that there are two alleles of different types. If you're heterozygous, you're Mm. You can't be heterozygous dominant or heterozygous recessive because by definition if you're heterozygous you have one of each allele.You only specify dominant or recessive when it's homozygous. So, in short, it's neither, it's just plain heterozygous.f you're heterozygous, you're Mm. You can't be heterozygous dominant or heterozygous recessive because by definition if you're heterozygous you have one of each allele. You only specify dominant or recessive when it's homozygous.
Let's say that red is dominant and white is recessive. A plant containing 2 red alleles (homozygous for the dominant allele) will be red. A plant containing 2 copies of the white allele (Homozygous recessive) will be white and heterozygous plant, containing a single copy of both alleles will be red.There is no heterozygous recessive because the dominant allele will determine the phenotype.hen different forms of  the same gene are inherited from parents, they are heterozygous.    Dominance refers to the relation between alleles of a gene. When  two alleles of a gene combine, the dominant one then determines the  trait that is expressed.