Punnett 2.1
TI-83 BASIC
A-Shell compatible
By Robert Maresh
(C) 1999 Kevtiva Interactive

2.1 fixes a 'bug' and adds information for TI-83 Plus users.

DIHYBRID CROSS:
If you are using Punnett squares in biology class right now, this is the prgm
for you. This program performs a di-hybrid cross for all of the alleles you
input. To perform a di-hybrid cross, input the alleles when you are prompted:

Parent 1: AAzz
Parent 2: AaZZ

After that, the program draws the cross, and then you can copy it to paper.
Press enter, and it will give you the alleles for the top, and the left
parent.  Always put the dominant allele first and the recessive allele second
for best results.

To find the small lowercase letters, press VARS, 5, and then look around in
the menus for these letters: abcdenprstxyz.
Press 2nd, then 7, 8, or 9 to get a lower case u, v, or w.
press 2nd, then . to get a lower case i.  to get a lower case l, press 2nd,
then 0, then l. These lower case letters make it easier to make a Punnett
square on the calculator. 

On a TI-83 Plus, if you activate lowercase letters using calcsys or another
program, it makes using lowercase letters much more easy. Just press Alpha
twice once they are enabled.

MONOHYBRID CROSS:
To do a mono-hybrid cross, input 2 alleles each time you are prompted,
followed by at least two spaces:

Parent 1: Bb  	;<-There are 2 spaces here after Bb!
Parent 2: Bb  	;<-

After entering the alleles, the graph will display a DIHYBRID CROSS.  Ignore
all of the alleles on the edges, and only pay attention to the four middle
squares (this is where the mono-hybrid cross is).  Press Enter, and use the
two middle alleles.  The above example would show:

TOP:	B B b b
LEFT:	B B b b

You would use Bb and Bb (the middle letters!)

This program uses and deletes Str0, Str1, Str2, and L1.

url:	http://calc.kevtiva.com/
email:	calc@kevtiva.com