Jimmy's Crossed Eyes Were Not Diagnosed and Treated Until He

question 121

Multiple Choice

Jimmy's crossed eyes were not diagnosed and treated until he was an adolescent.Based on your knowledge of critical periods,what do you think would be the result of the crossed eyes on his adult vision?

• A) The crossed eyes will have no effect on his adult vision.
• B) The crossed eyes are likely to result in poorer adult vision because they were not corrected until after the critical period.
• C) The crossed eyes are unlikely to result in poorer adult vision because they were corrected within the critical period.
• D) He will be blind because the correction occurred after the critical period.

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Definitions:

Allele Frequencies

The proportional occurrences of various alleles for a specific gene within a certain population.

Adaptive Traits

Features of an organism that have evolved through natural selection and increase survival and reproductive success in a particular environment.

Artiodactyls

A group of hoofed mammals that typically have an even number of toes, including cattle, pigs, and deer.

Astragalus

A genus of plants in the legume family, some species of which are used in traditional medicine.