[nabs-l] punnett squares

[Ashley Bramlett]

Hi,
You cannot do punnet squares in a linear form on a braille note. Use a
brailler; yes do them on graph paper or make the  squares tactilly somehow.
I used large print. But same concepts apply. Punnet squares are a grid of
squares. So picture a small table.
I believe they are two rows, two colums as  I recall. You put two
letters in each square to represent genes.
I really hope I explain the representation right as its been years since bio 
for me.
If you bring two of the same letters together, its homozygous. Note the 
capital or lowercase letters as I write.
Capitals are dominant and lower case are recessive.
Example:  bb for recessive brown eyes.
Example B B for dominant blue eyes.

If you have different case of letters, its hetro zygous.
You look at the top letter and letter on the side to put the letters in the 
square. For instance a Large P for dominant gene on top and on the side a 
small O for recessive gene. So you write P O in the block.
Quite hard to explain without showing you. I suggest you ask your teachers 
for clarification.

This video might help; maybe if you watch it with a sighted person they can 
help you understand it.
http://www.youtube.com/watch?v=J8SQAiVWw_s

Ashley
-----Original Message----- 
From: vejas
Sent: Monday, February 27, 2012 7:08 PM
To: nabs-l at nfbnet.org
Subject: [nabs-l] punnett squares

Hi,
I am really, really, really confused with Punnett squares.  So I
have some questions about them.

First, to make them, should I use a Perkins Brailler? I do all my
other science work, as well as for my other subjects except math
homework, on my Braille-Note Apex.  Would a Perkins Brailler be
better?
Also, do you hand-make the grids? I have some graph paper from
math that I might be able to use, but hand-making them might be
easier.
So can you please explain how to make a Punnett? Also, it would
really help if you could additionally tell me how you learned
Punnett squares because I'm really confused.
Thank you for your time.  Attached to this email is a copy of the
questions from the worksheet that I am supposed to do for
homework.  Ignore Problem 10 and any others that you don't have
to solve.
Sincerely,

Vejas






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