Offspring with four phenotypes in a 1:1:1:1 ratio can be produced by 

A. AaBb ´ AaBb.
B. AABB ´ AaBb.
C. AaBa ´ AABb.
D. AaBb ´ aabb.


D. AaBb ´ aabb.

Biology & Microbiology

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The structure in the figure above represents a molecule of ____

a. pre-mRNA b. tRNA c. snRNA d. mRNA e. rRNA

Biology & Microbiology

What domain of a transcription factor regulates transcription by interacting with other proteins?

a) DNA-unwinding domain b) DNA-binding domain c) activation domain d) repression domain

Biology & Microbiology

The Humboldt Current runs along the coast of South America, carrying nitrogen-rich cold water northward.

Answer the following statement true (T) or false (F)

Biology & Microbiology

How can DNA barcoding help to prevent disease?  Check all that apply.

A. Animals that are necessary to perpetuate the life cycle of disease causing insects can be quickly identified. B. Genes for pesticide resistance can be quickly identified. C. Insects that are known to directly cause disease can be quickly identified. D. Genes that are necessary for the ability of insects to cause disease can be quickly identified.

Biology & Microbiology