How is a dominant trait typically represented in genetics?

• A. By an uppercase letter
• B. By a number
• C. By a symbol
• D. By a lowercase letter

Answer: (A)

Verified step by step guidance

1. In genetics, traits are represented by alleles, which are different forms of a gene.
2. Alleles can be dominant or recessive. A dominant allele is one that expresses its trait even if only one copy is present.
3. To represent alleles, geneticists use letters. A dominant trait is typically represented by an uppercase letter.
4. For example, if 'A' represents a dominant allele for a trait, then 'a' would represent the recessive allele for the same trait.
5. This convention helps in understanding and predicting the inheritance patterns of traits in organisms.