Mendel was able to identify predictable patterns of heredity. He succeeded mainly because he chose to study traits that

A.) were always dominant.
B.) tended to be recessive.
C.) could be diluted.
D.) had only two forms.


Answer: D.) had only two forms.

Biology & Microbiology

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If one compares the forearm of a human, dog, bird, and whale and finds that they indicate common ancestry, what would we call these structures?

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Presently, it is thought that organic polymers may have formed and accumulated on:

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