7 MYTHS You Still Believe About GENETICS!

– It’s been said that we’re
a mixture of our parents, every trait coming
directly from one of them as they define who we are. But what if I told you that
that isn’t exactly true? This is Myths You Still
Believe, the series all about explaining the truth behind the most commonly believed myths. Today we’re putting the microscope on all things that we thought
we knew about genetics and exposing the truth behind many common pieces of misinformation. So without further ado, here are We’ve all heard it before,
“Ooh, they got good genes” or “Oh they got that from their mom”, suggesting that that family
has something different within their genetics
that differs from others. Well the truth is that
we all have the same 20,000 protein coding gene set. It’s only genetic variations
within and around those genes that creates our individual differences. Sometimes it’s just luck
of the draw, which is why you’ll often hear how beautiful people have won the genetic lottery. Now it is possible for someone to be born without a specific gene,
but that is extremely rare and it’s called a genetic deletion event. Let’s say your grandfather
has a certain trait or disease that you have as well but it seems to have skipped your parents. That kind of phenomenon has led to a widespread myth that some
traits skip a generation. The truth is while some
diseases and traits appear to skip a generation, in actuality there are absolutely none that do. The quote/unquote skip can actually be attributed to defective copies of genes within your grandfather matching with normal copies of genes
in your grandmother, making your direct parent
a carrier of the trait but not actually affected by it. But if your other parent
has those defective genes then you will have a
high chance, when born, of being affected by that
trait or disease, tricky genes. If you’ve ever seen a daytime
talk show about paternity or a movie about a young woman coming face to face with her absent
father for the first time you’ve likely heard of this myth. The notion is that someone
can recognize a relative solely based on a feature
that they share, eye color hair color, or maybe even
a facial twitch or allergy. Now while some physical
appearances do have a genetic basis, it’s not something
that is a definite giveaway. Take the eyes for
example, you could be born with the same blue eyes your father has but like many developing
infants, your eye color can actually change in the first
few months of your life, potentially leaving you
with a pair of brown eyes that oddly resemble the mailman. Hmm, mama got some ‘xplainin’ to do. Speaking of debunking myths involving physical similarities
between parents and children, here’s an interesting one for you. If your parents are both left handed then you’ll be left handed, right? Well, not necessarily. In fact, there’s only a one in four chance of you being left handed
regardless of your parents. According to Dr. Chris McManus from the University College London, the concept of handedness
is a common misconception. In a study involving 70,000 children he concluded that if both
parents are right handed, there is a nine percent
chance that they will still have a left handed
child and a 19 percent chance if one of them is already a leftie. So your parents being left handed does increase your chances of being so too, but it does not definitely determine it. This myth says that all
mutations in your genetic code are one hundred percent bad for you and while it’s true that
mutations gained from exposure to viruses, radiation
and certain chemicals can cause damage to your immune system, not to mention those inherited
directly from your parents, few are actually harmful. In fact, many mutations
can actually benefit you. Now I’m not talking about the
kind of X-Men style mutation that transforms you into a superhero, though in a way mutations can make you a better than average human being. For instance, there are mutations that can make your body more resilient, increasing your ability
to fight off disease or even make you immune to
specific infections and viruses. Popular science, dramatic
TV shows and movies tell us that defects or
mutations in genes happen because of exposure to
radioactive materials, chemicals or because we’re not taking
care of our bodies enough. Ah but this is yet another
lie that we believe, mostly because of the media. Often when we find out that there’s a genetic disease in our family,
we often start searching for environmental reasons that
disease originally got there. Exposure to certain
elements can damage our DNA but this is very unlikely
to create health issues we pass along to our offspring unless you’re pregnant at the time of exposure. Generally genetic diseases
most often stem from random errors our cells experience
while processing copying DNA. This myth may very well be the
most surprising on the list, and yet with a better understanding of how genetics work, can be the most obvious. It claims that if you have an illness that nobody else in your family tree has, it must mean that what
you have is not hereditary and thus not genetically passed. But the truth is, even
without a family history of your illness, it’s very
possible that that illness or disease laid dormant in
your parents’ genetic make up. That is, of course, until it
made an appearance in you. There have been many cases of two parents, each harboring a single
defective gene inside of them. When they procreate their
individual defective genes are both potentially passed to the child, creating a recessive
disorder, causing you to be sick with the genetic disease And now my friends you’re just a little bit smarter, giddy up. My friends if you enjoyed
this please give it a like and be sure to push the
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so you never miss a video. Thank you all so much for watching and I will see you soon, peace, bye!


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