My name is Brittany, I am a digital artist
with a minor in biology, and frankly…
I’m sick of science being taught from a
textbook.
My science videos are made specifically for
people that are visual and tactile learners.
It’s annoying that we’re in a digital
age where education could be way more interesting
but we’re stuck with books and text.
The Law of Segregation is a scientific law
stating that:
Organisms inherit 2 copies of genes (one from
each parent)
Organisms can only pass on one of their two
genes to their children.
When you think about it logically this law
makes sense.
the father starts with 2 copies of a gene,
and the mother also has 2 copies…
If they both gave all their genetic information
to the child… it would have 4 copies total.
In most species this would lead to death of
the offspring.
In animals chances are that child would not
even be born.
In order to have a healthy child, each parent
only passes down half of their DNA.
Therefore giving the baby the correct amount
of genes.
Because the meiosis division of genes on separate
chromosomes are random, when looking at one
specific trait... it is left to chance which
one is inherited.
What do I mean by that?
Well let’s look at this family tree of peas.
I have a purple dot which indicates purple
petals and this white dot that indicates white
petals.
If the father has two purple petals (homozygous),
and the mother has one of each (heterozygous)...
it is up to chance what the child will have.
First let's put the father’s dots in a bag.
Pull out one…
wow shoker!
It’s purple.
So now we can give that to the baby flower.
Let’s see what the mother is giving to the
baby.
Okay I pulled another purple…
So this means the baby’s genotype is going
to be homozygous for the purple.
But it was totally luck.
The baby could have been this… if chance
had made it this way.
This is the important factor of the Law of
Segregation.
This short video is part of my longer lesson
on Simple Mendelian Genetics.
If you like this style of visual explanation,
click here to continue learning.
Otherwise thanks for watching and I hope this
helps.
I’d love to hear any feedback from you,
as I will be making more educational videos
in the future and want to improve.
