How many recessive genes does a individual need in order to show the recessive trait?

Two recessive genes

Explanation: Every trait is controlled by at least a pair of gene, one inherited from the mother and the other inherited from the father. A recessive gene is a gene whose effect is masked by a dominant gene. A recessive gene lacks the ability to express itself in the presence of a dominant gene. For a recessive gene to manifest outwardly, it must occur in a homozygous state that is the individual must inherit two copies of the gene from its parents, one from the mother and one from the father.

so whats the answer

other information encoded in your genes might distinguish you from the others in the group