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.
the square of the leaning tower stands is- the Campo dei Miracoi- hope this helps :B