What condition leads to a deficiency in factor IX that can be corrected by an intravenous injection of vitamin K?

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#Question id: 16476

#Unit 12. Applied Biology

Which type of cultures can be used for cells which do not have cell to cell communication

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#Question id: 15149

#Unit 8. Inheritance Biology

In this problem we will explore some of the many ways that mutations in two different genes can interact to produce different Mendelian ratios. Consider a hypothetical insect species that has red eyes. Imagine mutations in two different unlinked genes that can, in certain combinations, block the formation of red eye pigment yielding mutants with white eyes. In principle, there are two different possible arrangements for two biochemical steps responsible for the formation of red eye pigment. The two genes might act in series such that a mutation in either gene would block the formation of red pigment. Alternatively, the two genes could act in parallel such that mutations in both genes would be required to block the formation of red pigment.

Further complexity arises from the possibility that mutations in either gene that lead to a block in enzymatic activity could be either dominant or recessive. If the crosses is made between a wild type insect with red eyes and a true breeding white eyed strain with mutations in both genes. Such considerations yield the Pathways in series with recessive mutations in both genes, what will be the phenotype in F1 progeny?

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#Question id: 1118

#Unit 4. Cell Communication and Cell Signaling

What are scaffolding proteins?

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#Question id: 7128

#Unit 5. Developmental Biology

Imagine that in an attempt to get the â-globin gene to be expressed in B-cells, the transcription factors (GATA-1 and GATA-2) known to control the â-globin gene in erythrocytes were introduced into B-cells, yet the â-globin gene was not expressed. What is a likely explanation for this result?

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#Question id: 5377

#General Aptitude

The average weight of A,B and C is 48kg , If the average weight of A and B be 45kg and that of B and C be 50kg ,Find the weight of B