Question

If an organism expresses a recessive phenotype, can you tell the genotype?

Answer 1

Simply yes.

Explanation:

For an organism to demonstrate the recessive phenotype there is only one possible genotype that can be attributed to them. For example brown eyes (B) is dominant over blue eyes (b). If an organism has blue eyes, the only possible genotypic combination is (bb), as there cannot be any presence of the dominant gene.

Hope that make sense!