Question

in a punnett square, a lower case letter stands for a --------- allele. recessive
homozygous
heterozygous
dominant

Explanation:

In genetics and Punnett square notation, uppercase letters represent dominant alleles, while lowercase letters represent alleles that are masked by dominant ones, which are recessive. Homozygous/heterozygous describe allele pairings, not the type indicated by a single lowercase letter.

Answer:

recessive