In Maize (Corn), Assume That the Genes a and B

question 30

Multiple Choice

In maize (corn) , assume that the genes A and B are linked and 30 map units apart. If a plant of Ab/aB is selfed, what proportion of the progeny would be expected to be of ab/ab genotype?

• A) 2.25%
• B) 15%
• C) 9%
• D) 30%
• E) 4.5%

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Definitions:

Foramen Magnum

The opening in the vertebrate skull through which the spinal cord passes.

Arboreal

Living in trees.

Earliest Primates

The most ancient members of the primate order, believed to have appeared in the Paleocene epoch, characterized by adaptations for arboreal life.

Homo Erectus

Species that originated in Africa about 1.7 mya and then spread to Europe and Asia; may have persisted until 200,000 years ago or later; may be an evolutionary dead end.