In the Ventral Nerve Cord of the Drosophila Larva, Each

question 17

Essay

In the ventral nerve cord of the Drosophila larva, each neuroblast (neural stem cell) divides repeatedly, regenerating itself and generating a transient ganglion mother cell with each division (Figure Q7-4). Each ganglion mother cell then divides to produce two daughter cells. At the end of this process, a full neuroblast lineage is composed of two different types of neurons, A and B, in approximately equal numbers. Figure Q7-4
A. How might these two distinct types of neurons be generated?
B. What are some experiments that could be performed to test this hypothesis?

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Definitions:

Adjusting Journal Entries

Entries made in the accounting records at the end of an accounting period to allocate income and expenditures to the period in which they actually occurred.

Accumulated Depreciation

The aggregate depreciation cost that has been accounted for a particular asset since its first operational use.

Depreciation Expense

The allocation of the cost of a tangible asset over its useful life for accounting purposes, reflecting wear and tear.

Salvage Value

The predicted value that an asset retains at the end of its service period.