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  • It's easy to feel like you're an even mix of your parents,

  • but that's not always the case.

  • So, who should you be blaming over those traits you don't like?

  • What did you inherit from Mom and what came from Dad?

  • Colour-blind?

  • If you're a male, you can thank your mother.

  • Red-green colour blindness is an X-linked disorder that

  • affects nearly 6% of the male population worldwide, but only 0.4% of females.

  • This is because males only inherit one X chromosome, which is from their mother,

  • and that's where red-green colorblindness comes from.

  • If you're a female, you have to get a the X-variant from both parents.

  • So that 0.4% can blame dad as well!

  • Balding?

  • A big component comes from the X-chromosome here too,

  • so you likely inherited this from your mom.

  • However, a study involving 52,000 people found that genes on other chromosomes can

  • affect this condition, on top of environmental factors such as age, stress, and diet -

  • so mom isn't entirely to blame!

  • Research has also found that the shape of the end of your nose, the area above and below the lips,

  • cheekbones and the inner corner of the eye are highly influenced by genetics.

  • And interestingly, the more they resemble your father as a child,

  • the healthier you're likely to be.

  • Why?

  • Scientists believe that a father-child resemblance causes fathers to spend more time engaging

  • in positive parenting, which ultimately contributes to healthier kids.

  • Now, even though you get half of your 46 chromosomes from mom and the other from dad,

  • a study involving genetically diverse mice found that

  • for 60% of genes the paternal copy was more active than the maternal copy.

  • This phenomenon is known as allelic imbalance.

  • The same study also noted that the brains of these particular mice more closely resembled

  • that of their dad than their mom.

  • However, in humans we actually see the opposite.

  • Our brains are more similar to our mother, which is particularly true for daughters.

  • Interestingly, the similar brain regions are actually associated with depressive conditions,

  • suggesting that mood disorders may pass from mother to daughter.

  • Biologists used to believe that all DNA came from the nucleus, but we now know that the

  • mitochondria (AKA the powerhouse of the cell) also kicks in some protein coding genes.

  • And this mitochondrial DNA is specifically inherited from your mom because

  • your dad's degraded immediately after fertilization.

  • Considering how important mitochondrial DNA is in the cell,

  • there is a stronger maternal link.

  • Mutations in mitochondrial DNA have been associated with Type 2 diabetes and Parkinson's disease

  • - which more likely came from your mom.

  • Maternal inheritance gave rise to the idea of a “Mitochondrial Eve”,

  • a woman who lived between 180,000 to 580,000 years ago

  • from which all human mitochondrial DNA is rooted.

  • At the end of the day, it may seem like a lot of traits actually come from your mom,

  • or at least, from the X chromosome - and that's generally true, genetically.

  • The Y-chromosome is very small, and doesn't contain as many genes;

  • and both females and males contain X-chromosomes, which carry more genes.

  • But as we continue to research more about ourselves at the genetic level,

  • the division between what you got from mom vs. dad may become even more pronounced.

  • If you want to know more about your own genetics,

  • you can visit 23andMe.com/asap, who sponsored this episode.

  • Whether you want to know about your chances of balding, back hair, your taste senses work or

  • where your ancestors came from, 23andMe's kit will get you started.

  • We both took the test, and I found out the GREAT news that

  • I have higher likelihood of having a little upper back hair,

  • which until recently I thought was FALSE, but as I've aged Greg told me that it is happening.

  • He's almost 30 and it's sprouted, so 23andMe was on that.

  • What I thought it's interesting is that you can find out how certain factors affect your weight.

  • Like for me fast food is likely to have the biggest impact on my weight followed by exercise.

  • Be sure to head to 23andMe.com/asap for the latest promotion on your kit.

  • As always, thanks for watching, make sure you subscribe

  • for more weekly science videos every Thursday, and we will see you next time!

It's easy to feel like you're an even mix of your parents,

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Mom vs. Dad: What Did You Inherit?

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    Cyndi posted on 2018/04/08
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