How do genes have an additive effect in polygenic inheritance? Select all that apply

Genes diversify to create several discrete phenotypes

A single gene with many alleles determines the phenotype

The number of possible phenotypes can add up until there is a continuous range of phenotypes

Each gene contributes a small part to the phenotype

typically, most spiders possess eight eyes. however, others have as many as 12, and some don't have any. these eyes are for detecting light from dark, deciphering shapes and for gathering their prey.

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option a and d is the correct answer

i hope this u

plz mark as the brainliest answer

i think that d. wind is the answer.   i missed the question when i answered a. currents.