It is possible to calculate the number of clones that must be present in a gene library to give a probability of obtaining a particular DNA sequence. This correct formula is:

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#Question id: 31378

#Unit 5. Developmental Biology

The following experimental manipulations were carried out with Xenopus embryo.

Manipulation X: Exposure to UV radiation leading to the failure of cortical rotation.

Manipulation Y: Gastrulae treated with lithium chloride.

The following statements were made with respect to the above manipulations. Which one of the following represents correct statement?

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#Question id: 31379

#Unit 5. Developmental Biology

The cadherin catenin complex is extremely important during compaction from a morula to the blastula. Transition of early embryonic cells into a blastula differed depending on the presence or absence of calcium ions. In addition, an investigator blocked the expression of β-catenin using vivo morpholinos to detect its effect simultaneously on compaction. Which one of the following conditions will lead to the most successful transition of the morula into the blastula?

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#Question id: 31384

#Unit 5. Developmental Biology

In drosophila, the third thoracic segment is transformed into another second thoracic segment due to:

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#Question id: 31387

#Unit 5. Developmental Biology

A sheet of cells that grows anteriorly from Koller’s sickle combines with the primary hypoblast to form the complete hypoblast layer is termed as:

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#Question id: 31390

#Unit 5. Developmental Biology

Which one of the following best describes, the number or amount of different cell types that particular stem cell type can generate? 

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#Question id: 31405

#Unit 5. Developmental Biology

The acquisition of a given cell identity based on its position or, more specifically, on the interactions that cell has with the other cells, phenomena known as: