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Another thing I find interesting is that your family right now are the most closest humans related to you. When you go back in time or forward in time, the rela

Another thing I find interesting is that your family right now are the most closest humans related to you. When you go back in time or forward in time, the relatedness dilutes.

irrational 5y ago
Even then, you and your sibling could, statistically, share zero genes (you each get 50% from each parent and it is possible you each got a different 50%). Your own parents and children are the closest relatives you have since you are guaranteed to have 50% of your parent’s genes and same with your children.
- deleted 5y ago
  [deleted]
- todd8 5y ago
  Humans have approximately 30,000 genes. These genes are sequences that appear in our DNA which is divided up amongst our 23 chromosomes. Offspring receive these genes from their two parents so during meiosis we receive some genetic material from our mother and some from our father. There is about a 50% chance of receiving the mother's gene and a 50% chance of receiving the father's gene for each of the 30,000 genes involves. (The details are more complicated, see [1].) So yes, statistically one could with probability of something like 1/(2^30000) receive a complete different set of genes than a sibling. In the real world, one will always share around 50% of ones genes with a sibling. [1] https://www.genome.gov/genetics-glossary/Crossing-Over https://www.genome.gov/genetics-glossary/Crossing-Over
  - haihaibye 5y ago
    The number of crossover events is 55-75 not once per gene, your numbers are off by a few orders of magnitude
- lordnacho 5y ago
  Identical twins are truly special in that sense.
- plafl 5y ago
  > share zero genes That would be impossible, unless one of you is some kind of bacteria. And even in that case I doubt it. According to Wikipedia[1] (yes, I invested some time to refute a random stranger on the internet, well, maybe a cousin) there is something like 0.1-0.4% of genetic variation between humans. [1] https://en.wikipedia.org/wiki/Human_genetic_variation https://en.wikipedia.org/wiki/Human_genetic_variation
  - ninjanomnom 5y ago
    The context here is familial relations, while it's true all humans share dna we ignore that when discussing whether someone is related to another.

Another thing I find interesting is that your family right now are the most closest humans related to you. When you go back in time or forward in time, the relatedness dilutes.

irrational 5y ago

Even then, you and your sibling could, statistically, share zero genes (you each get 50% from each parent and it is possible you each got a different 50%). Your own parents and children are the closest relatives you have since you are guaranteed to have 50% of your parent’s genes and same with your children.

deleted 5y ago
[deleted]
todd8 5y ago
Humans have approximately 30,000 genes. These genes are sequences that appear in our DNA which is divided up amongst our 23 chromosomes. Offspring receive these genes from their two parents so during meiosis we receive some genetic material from our mother and some from our father. There is about a 50% chance of receiving the mother's gene and a 50% chance of receiving the father's gene for each of the 30,000 genes involves. (The details are more complicated, see [1].) So yes, statistically one could with probability of something like 1/(2^30000) receive a complete different set of genes than a sibling. In the real world, one will always share around 50% of ones genes with a sibling. [1] https://www.genome.gov/genetics-glossary/Crossing-Over https://www.genome.gov/genetics-glossary/Crossing-Over
- haihaibye 5y ago
  The number of crossover events is 55-75 not once per gene, your numbers are off by a few orders of magnitude
lordnacho 5y ago
Identical twins are truly special in that sense.
plafl 5y ago
> share zero genes That would be impossible, unless one of you is some kind of bacteria. And even in that case I doubt it. According to Wikipedia[1] (yes, I invested some time to refute a random stranger on the internet, well, maybe a cousin) there is something like 0.1-0.4% of genetic variation between humans. [1] https://en.wikipedia.org/wiki/Human_genetic_variation https://en.wikipedia.org/wiki/Human_genetic_variation
- ninjanomnom 5y ago
  The context here is familial relations, while it's true all humans share dna we ignore that when discussing whether someone is related to another.