AP BIOLOGY

ANIMAL REPRODUCTION AND DEVELOPMENT

EMBRYONIC DEVELOPMENT

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Differentiation and morphogenesis are controlled by external factors, such as contact and signals from neighboring cells ____ this is called
A
cytoplasmic determinants
B
inductive signals
C
endosymbiotic theory
D
epigenetic inheritance
Explanation: 

Detailed explanation-1: -Moreover, cell differentiation is controlled by transcription factors, while morphogenesis is controlled by the spatial and temporal control of embryo mechanics. Also, cell movements play an important role in morphogenesis, unlike differentiation.

Detailed explanation-2: -Cell differentiation: Changes in a cell’s set of expressed genes (its molecular phenotype) Morphogenesis: The processes that generate tissue organization and shape and are usually the downstream response to the timing and patterning.

Detailed explanation-3: -inductive cell-cell signaling Gene Ontology Term (GO:0031129) Definition: Signaling at short range between cells of different ancestry and developmental potential that results in one cell or group of cells effecting a developmental change in the other.

Detailed explanation-4: -Morphogenesis arises because of changes in the cellular structure or how cells interact in tissues. Certain cell types “sort out". Cell “sorting out” means that when the cell physically interact they move so as to sort into clusters that maximize contact between cells of the same type.

There is 1 question to complete.