Question

Describe an individual with the karyotype shown.

Answer 1

a female with Turner's syndrome
a male with Klinefelter's syndrome
a female with Down syndrome
a normal male

Answer 2

a http://en.wikipedia.org/wiki/Karyotype

Answer 3

http://teenink.com/hot_topics/health/article/4737/Turner-Syndrome/

Answer 4

Okay.

So, the chart that you posted shows us all the chromosomes,
in one human cell.

NORMALLY, humans have 46 chromosomes,
which is the same as 23 PAIRS of chromosomes.

Take a look at the chart.

There are 23 numbered groups, on the chart.
And every group SHOULD have two chromosomes,
you see?

For example,
take a look at group number 1,
and ONLY at group number 1.

Group number 1 has two chromosomes.

Now look at group number 2.

Group number 2 also has two chromosomes.

They should ALL be like that.

EVERY numbered group should have TWO chromosomes.

~~~~~~~~~~~

Take a look at group number 23.

Do you see something weird about group number 23?

There's only ONE chromosome!

That's not normal. Not at all.

~~~~~~~~~~

Is the chromosome in group number 23 long, or short?

It's long.

That means it's an X chromosome.
(Because Y chromosomes are short.)

So, again,
there is only ONE chromosome, in group number 23.
There SHOULD be two.

In group number 23,
we only have an X chromosome.

So, there's a missing chromosome.

A FEMALE would have (X X)
A MALE would have (X Y)

~~~~~~~~~~~~

Now, let's take a look at all our choices:

What are we looking at?

-- a female with Turner's syndrome
-- a male with Klinefelter's syndrome
-- a female with Down syndrome
-- a normal male

~~~~~~~~~~~~~~~

Let me tell you about the FIRST choice -- Turner's Syndrome.

Turner's Syndrome is where a FEMALE is missing an X chromosome,
in group number 23.

Does that sound familiar to you?

~~~~~~~~~~~~~~~

Klinefelter's Syndrome is where a MALE has an extra X chromosome,
in group number 23.

~~~~~~~~~~~~~

Down Syndrome is where a person has an extra chromosome,
in group number 21.

~~~~~~~~~~

And NORMAL people should have 2 chromosomes in each group.

Answer 5

So its...b?? thats probably wrong

Answer 6

god damn ! nicely explained...

Answer 7

"Klinefelter's Syndrome is where a MALE has an extra X chromosome, in group number 23."
is that what you see on the picture?

Answer 8

@UmmmHELP

Take another look at the chart that you posted:
http://assets.openstudy.com/updates/attachments/50f629efe4b081e396d7e559-ummmhelp-1358309936406-bio.gif

Do you see how there are numbered groups, on the chart?

Every group SHOULD have 2 chromosomes.

Look at group #1.

You can see that in group #1,
there are two chromosomes.

That is normal.

Every group should have two chromosomes.

Now, take a look at #23.

We notice that in group #23,
there is only one chromosome. You see there?

That's not normal.
There SHOULD be two.

So,
the person, whose chart this belongs to, has a genetic disorder.
We know that, because this chart does not look like a normal person's chart.

Group #23 does not have two chromosomes.

There is only one chromosome in group #23.
And that means that one is missing.

~~~~~~~~~~~

Using that information,
what you can do is go back to the part where I explained all of your choices,
and see if you can pick out the right one, this time.

Answer 9

Okay, @InYourHead but I already submitted the answer to this one and I figured it out and got the right answer...but thanks anyway!