Assume that three loci, each with two alleles (A and a, B and b, C and c), determine the differences in height between two homozygous strains of a plant. These genes are additive and equal in their effects on plant height. One strain (aabbcc) is 10 cm in height. The other strain (AABBCC) is 22 cm in height. The two strains are crossed, and the resulting F1 are interbred to produce 1000 F2 progeny. what is number of F2 progeny having intermediate height?

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#Question id: 28233

#Unit 5. Developmental Biology

Regulation is highly influenced by the microenvironment that surrounds a stem cell is known as 

TLS Online TPP Program

#Question id: 28234

#Unit 5. Developmental Biology

which statement is correct the Principles of stem cell regulation?

TLS Online TPP Program

#Question id: 28235

#Unit 5. Developmental Biology

 Principles of stem cell regulation including extracellular mechanism which define the physical and chemical regulation, which of the following statements best describe the main differences between these two mechanism?

a) physical mechanism takes the form of secreted proteins from surrounding cells that influence stem cell & progenitor differentiation through endocrine

b) Chemical mechanisms including Structural & adhesion factors within the extracellular matrix 

c) physical mechanisms including Structural & adhesion factors within the extracellular matrix 

d) chemical regulation of stem cells takes the form of secreted proteins from surrounding cells that influence stem cell & progenitor differentiation through endocrine

TLS Online TPP Program

#Question id: 28236

#Unit 5. Developmental Biology

 One of the mechanism of stem cell regulation is Extracellular mechanisms which involve physical as well as chemical regulation. which of the following prediction is incorrect about the Physical mechanisms ?

TLS Online TPP Program

#Question id: 28237

#Unit 5. Developmental Biology

One of the regulation of extracellular mechanism is chemical regulation of stem cells takes the form of secreted proteins from surrounding cells that influence stem cell through signals, these Chemical signals maintain the stem cell in which state?

TLS Online TPP Program

#Question id: 28238

#Unit 5. Developmental Biology

 At what state stem cell exist, when stem cells become positioned farther from the niche?