Which gene from B. amyloliquefaciens was placed under the control of infection-specific promoter prp 1-1 and was transferred into potato.

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#Question id: 11657

#Unit 10. Ecological Principles

In the following diagram, three models succession are represented. In this diagram A,B,C and D are the species  and arrows indicate replaced by

Based on the above, which statement is correct.

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#Question id: 10273

#Unit 6. System Physiology – Plant

The existence of different pathways that serve a similar function and can replace each other without a clear loss in function is called,

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#Question id: 4572

#Unit 11. Evolution and Behavior

Of the following anatomical structures, which is homologous to the wing of a bird?

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#Question id: 19242

#Unit 12. Applied Biology

The GUS activity in transformed plant tissues can be localized by the presence of a blue color that is formed after the hydrolysis of the uncolored substrate 

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#Question id: 15151

#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 a recessive mutation in one gene and a dominant mutation in the other, determine the phenotype of the F1 progeny and the expected phenotypic ratio of red to white eyed insects in the F2.