Partial or complete loss of hearing (deafness) can be caused by damage to the ________.

I) axons of the neurons associated with each hair cell that carry information to the brain

II) hair cells (the sensory receptors) in the cochlea

III) tympanic membrane, or eardrum

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#Question id: 28516

#Unit 5. Developmental Biology

The two-experiment performed by a scientist with a forelimb mesenchyme and seeing their results;

I-leg mesenchyme is placed directly beneath the wing AER

II-limb mesenchyme is replaced by non-limb mesenchyme beneath the AER

Conclusion of these experiment are seeing; 

a) distal hindlimb structures develop at the end of the limb

b) supernumerary structures are formed, usually toward the distal end of the limb

c) the AER regresses and limb development ceases

Select the correct result about these experiments-

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#Question id: 28517

#Unit 5. Developmental Biology

What would be the effect of FGFs and Wnts treatment on the ‘bone formation’ of young limb bud mesenchyme?

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#Question id: 28518

#Unit 5. Developmental Biology

Achondroplasia is caused by base-pair substitution mutation that converts ____

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#Question id: 28519

#Unit 5. Developmental Biology

A Condition wherein chondrocytes stop proliferating earlier than usual, resulting in short limbs, that causes

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#Question id: 28520

#Unit 5. Developmental Biology

Thanatophoric dysplasia is caused by the mutation in which of the following;

a) base-pair substitution that converts glycine to arginine 

b) extracellular domain of the FgfR3 protein

c) transmembrane domain of the FgfR3 protein

d) tyrosine kinase intracellular domain of the FgfR3 protein

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#Question id: 31241

#Unit 5. Developmental Biology

An area of the embryo containing all of the cells capable of forming a limb, named as: