Try using the example of your family and families of close relatives to analyze the inheritance of certain traits of a person

Try using the example of your family and families of close relatives to analyze the inheritance of certain traits of a person. This can be, for example, the color of the hair or eyes, the length of the eyelashes, the thickness of the lips, the presence or absence of freckles (or dimples on the chin), the ability or inability to curl the tongue with a tube, etc. Try to identify dominant and recessive symptoms. How can this be done?

Dominant and recessive signs can be identified on the basis of the first and second laws of Mendel.
For example, one parent and all his relatives have brown eyes, while the other parent and his relatives have blue eyes. Children in this family are brown-eyed. Based on the first law of Mendel, we can conclude that in humans, brown eye color dominates blue.
Another example: in a family where both parents have long eyelashes, there are children with long and short eyelashes (or at least one child with short eyelashes). Applying the second law of Mendel, we can say that long eyelashes dominate over short.