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smileetons smileetons
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13 years ago
I need to use Rrtt and rrTt, but doesn't the Rrtt only give you three? I'm confused, please HELP!
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wrote...
13 years ago
Make a 4 by 4 square. Write RT, rT, Rt and rt on the top and left. Croos them and you will get 16 phenotypes and genotypes. The dominant is always R and T. This is tobe noted. \

For the image check: http://library.thinkquest.org/12022/l8c.gif
wrote...
13 years ago
Not sure what you're looking for, but this is a 2x2 Punnett square.  Rrtt produces 2 kinds of gametes, Rt and rt.  rrTt produces 2 kinds of gametes, rT and rt.  The Punnett square is:
______Rt______rt___
rT____RrTt____rrTt__
rt____Rrtt_____rrtt__

Both the genotypic and phenotypic ratios are 1:1:1:1
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