A small letter stands for a recessive allele.
recessive
A capital letter in a punnet square stands for a domminant trait, or one that will most likely appear. --Stew Pidacel
Capital letters on Punnett Squares represent dominant genes, while lowercase letters represent recessive genes. For example, if the trait "T" is a tall gene and the trait "t" is a short gene. When you get your results (if both parents are heterozygous for tallness, Tt) you get four possible results, 1 TT (homozygous tall), 2 Tt (twice, heterozygous tall Tt), and 1 tt (homozygous short). If there is a dominant gene there, that gene will be displayed. Only if there are two recessive genes will the recessive trait be displayed.
a CAPITAL letter
a recessive allele is shown using a lower case letter a dominant allele is shown using a capital letter
capital letter
Normally a dominant allele is represented by a capital letter. It can be any letter used. Example; Brown hair is dominant and blond is recessive. B represents the dominant allele (brown) and b represents the recessive (blond) in Bb. You can have any combination of two alleles; BB, Bb, or bb. BB would have brown hair, Bb would have brown hair or a mix, and bb would have blond hair. Instead of B we could have used T or any other letter.
Using Punnett Squares, you can predict the genotypes and phenotypes of the offspring of a cross between a homozygous (purebred) tall pea plant and a homozygous (purebred) short pea plant.
The capital letter that stands for that type of trait. For example, brown eyes would be either BB or Bb ^ capital
Circle stands for female and square stands for male.
Admiral Lord Nelson stands at the top of the statue in Trafalgar Square.
it stands for the letter A