Whatâs more, they are not regulated by the FDA. This means manufacturers can put in anything they want to, including cheap toxic chemicals with highly harmful effects in the body. Why does this matter if youâre not drinking shampoo? Any substance you rub on your skin or inhale will enter your body just as surely as if you had swallowed it.
Recessive trait. Definition. noun. (genetics) A genetic trait that results from the expression of the two recessive alleles. Supplement. When the dominant allele is lacking or when the two alleles present are both recessive, their expression results in a recessive trait.
Remember, individuals must have two alleles for a gene, so someone could be homozygous dominant (EE), homozygous recessive (ee), or heterozygous (Ee). In this example, the recessive trait is having attached earlobes and is only seen in someone with the genotype ee (homozygous recessive). recessive trait is the phenotype that is seen only when a homozygous recessive genotype for the trait of interest is present. This means that an individual must have two recessive alleles for the gene that determines this trait of interest.