Human Anatomy, Physiology, and Medicine. Anything human!

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Post by edbaseball17 » Wed Sep 19, 2007 2:53 am

which one of these is a testcross?

DD X dd
D? x dd
Dd X Dd
D? x D?

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Post by Jammerz » Wed Sep 19, 2007 4:07 am

A testcross is one in which you cross an organism with unknown genotype with an organism of known, homozygous recessive genotype.

Knowing that, you should be able to pick the right answer.

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