In recessive lethal diseases such as tay-sachs disease, carriers have one copy of the normal allele and one copy of the allele for the disease. carriers are represented in the hardy-weinberg formula by

2pq

Explanation:

According to my research on studies conducted by various genetecists, I can say that based on the information provided within the question carriers are represented in the Hardy-Weinberg formula by the variable 2pq. This variable represents the frequency of the heterozygous genotype which is the genotype that  include one normal allele and one mutation, or two different mutations. Which is what the carriers are.

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