Normally, the FgfR3 protein (a receptor tyrosine kinase) is activated by a fibroblast growth factor and signals the chondrocytes to stop dividing and begin differentiating into cartilage. This signal is mediated by the Stat protein, which is phosphorylated by activated FgfR3 and then translocated into the nucleus. Inside the nucleus, Stat activates the genes encoding a cell cycle inhibitor, the p21 protein. The mutation in FgfR3 causes the lethal condition thanatophoric dysplasia. This condition may be achieved by:

A. Mutations in the extracellular domain of the FgfR3 protein

B. Mutations in the tyrosine kinase intracellular domain of the FgfR3 protein

C. Mutations in the transmembrane domain of the FgfR3 protein

Which of the following is correct?

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#Question id: 12160

#Unit 9. Diversity of Life Forms

Which of these was not derived from an ancestral alpha proteobacterium?

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#Question id: 12161

#Unit 8. Inheritance Biology

If a cross is made between  two plant heights  46cm and 10cm. The f2 Genotype has been shown;

I) AABBCC - 2) AABBCc – 3) AABbCc – 4) AaBbCc–  5) AaBbcc – 6) Aabbcc – 7) aabbcc –

Find out the 

i) phenotypic values of the given character 

ii) determining the no of polygenes involves and 

iii) what will be the no of QTL?

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#Question id: 12162

#Unit 8. Inheritance Biology

Nilsson-Ehle’s cross obtained homozygous varieties of wheat that differed in color, he crossed a variety of wheat that possessed white kernels with a variety that possessed  red kernels and obtained the following results:

The following conclusions are made from the results obtained;

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#Question id: 12163

#Unit 8. Inheritance Biology

A cross is made between the two pure line homozygous plant their height is 6cm and 2cm. the F1 progeny shows 6 cm height. the variations takes place in F2 progeny , which were made by 

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#Question id: 12164

#Unit 8. Inheritance Biology

What is the value of broad sense and narrow sense heritability respectively , if the given values of;

A) dominance genetic variance =0.4 , 

B) genic interaction variance =0.3,  

C) additive genetic variance =0.6, 

D) environmental variance=0.8,  

E) genetic−environmental interaction variance=0.3

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#Question id: 12165

#Unit 8. Inheritance Biology

If the environmental variance increases and all other variance components remain same , then what will be the effect on heritability?