How to Write Dominant and Recessive Alleles in Genetics
Learn the correct notation for dominant and recessive alleles using uppercase and lowercase letters in genetics.
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To write dominant and recessive alleles, use uppercase letters for dominant alleles and lowercase letters for recessive alleles. For example, if 'A' represents a dominant allele for a trait and 'a' represents a recessive allele, 'AA' or 'Aa' will display the dominant trait, while 'aa' will express the recessive trait. This notation makes it clear which allele is dominant and which is recessive.
FAQs & Answers
- What letters represent dominant and recessive alleles? Dominant alleles are represented by uppercase letters, while recessive alleles are represented by lowercase letters.
- How do you know if a trait is dominant or recessive from allele notation? If an individual has at least one dominant allele (uppercase letter), the dominant trait is expressed; the recessive trait only appears when both alleles are recessive (lowercase).
- Can heterozygous genotypes show dominant traits? Yes, heterozygous genotypes (one dominant and one recessive allele) will display the dominant trait.