Thats a great question, it can be defined as the study of inheritance as it occurs in humans. An example is that you have inherited your eye colour from your parents, we would investigate why that is. There are sadly some illness that are passed from parent to child and researchers look at why this is and try to find treatments to help.
I hope this answers your question, please do write and ask me anything else.
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Diddi commented on :
Sad to see you leave Daniel, you did really well!!!