What kind of letter is used for recessive traits

Lower case letters are used for recessive traits

In biology, a trait or character is a feature of an organism.  A trait refers to any genetically determined characteristic in the body. In technical terms, a genetic trait is amenable to segregation analysis rather than quantitative analysis.  Recessive traits are those that are expressed only when two copies of an allele are present in the gene.

answer; the above statement/question is (false);