a mother and her young daughter stand side by side looking into a mirror together. The daughter points excitedly at their reflection, noticing they have identical curly red hair and bright green eyes. The mother smiles warmly as she gently touches both their hair, showing the clear similarity. Behind them, family photos on the wall display multiple generations with the same distinctive features. Other family members in the background nod approvingly at the obvious resemblance. a unit of heredity which is transferred from a parent to offspring and determines some characteristics