Why is there a range around the relationship

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Reference no: EM133753423

Question 1: Why are parent-child relationships always exactly 50%, without a range? (Note this chart, like most DTCGT, is working with autosomes, aka chromosomes 1-22.)
Can you tell from DNA comparison who is the child and who is the parent? (Companies might use other user data collected at sign up to decide for sure.)
Why is there a range around the relationship between full siblings?
Are the full siblings on average as closely related as parent-child?
What are ¾ siblings? (Why does the chart say they are a "combination of half siblings and first cousins"?)
Is your answer in the previous question the same thing as incest, or is it a different way that families get complicated?
What are double first cousins? Is that incest, or is it a different way that families get complicated?
If you find fully identical regions in comparing two people, could you rule out half-siblings who share only one parent in common, assuming that their other nonshared parents were not related?
What second-degree relatives are as closely related as a half-sibling, and indistinguishable from looking at genetic relatedness alone?
How could you (or a DTCGT company algorithm) use age to try tell the difference between the answers to the previous question? Is that always effective or certain?

Reference no: EM133753423

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