While the same genes direct development in all vertebrate lineages, the ____ is partially responsible for variations in the adult forms of vertebrates.
A)timing of developmental steps
B)selective deletion of Hox genes
C)global duplication of Hox genes
D)a specific environmental trigger
E)mitochondrial gene expression

Question

​While the same genes direct development in all vertebrate lineages, the ____ is partially responsible for variations in the adult forms of vertebrates.
A)​timing of developmental steps
B)​selective deletion of Hox genes
C)​global duplication of Hox genes
D)​a specific environmental trigger
E)​mitochondrial gene expression

Quizplus · Accepted Answer

The timing of developmental steps is partially responsible for the variations in adult forms of vertebrates. Even though all vertebrates share the same set of genes that control development, differences in the timing of their expression can lead to significant variations in their adult forms.

​While the Same Genes Direct Development in All Vertebrate Lineages

While the Same Genes Direct Development in All Vertebrate Lineages