Question

dominant alleles are represented by a(n)
phenotype
lower case letter
upper case letter
punnett square

Explanation:

In genetics (a subfield of Biology, which is part of Natural Science), dominant alleles are represented by uppercase letters, while recessive alleles are represented by lowercase letters. A phenotype is the observable trait, and a Punnett square is a tool to predict genetic crosses. So the correct option is the one with "upper case letter".

Answer:

C. upper case letter (assuming the options are labeled A: phenotype, B: lower case letter, C: upper case letter, D: punnett square)