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The diagram below shows the association of phenotype and gene expression patterns in five different species. The top portion shows the phylogeny of the five species; below the phylogeny are the phenotypes of the five species; and at the bottom are the expression patterns for three different genes (genes 1, 2, and 3) at two different time points in development (early and late), and in two different locations in the embryo (top and bottom).
-The phenotypes of species B and E illustrate the phenomenon of
A) developmental plasticity.
B) homology.
C) diapause.
D) parallel phenotypic evolution.
E) pleiotropy.

Question

Use the following to answer questions :
The diagram below shows the association of phenotype and gene expression patterns in five different species. The top portion shows the phylogeny of the five species; below the phylogeny are the phenotypes of the five species; and at the bottom are the expression patterns for three different genes (genes 1, 2, and 3) at two different time points in development (early and late), and in two different locations in the embryo (top and bottom). 
-The phenotypes of species B and E illustrate the phenomenon of
A) developmental plasticity. 
B) homology. 
C) diapause. 
D) parallel phenotypic evolution. 
E) pleiotropy.

Quizplus · Accepted Answer

Parallel phenotypic evolution occurs when two species independently evolve similar traits, often due to similar environmental pressures or ecological niches.

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