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?

#Question id: 10537

#SCPH05 I Biotechnology

Given below some functions of the glutamate receptor-like (GLR) genes. Which one is incorrect?

#Question id: 10538

#I Life Science/ Life Sciences Group – I-V

Injury to the leaf caused by herbivory activates which types of ion channels?

#Question id: 10538

#SCPH05 I Biotechnology

Injury to the leaf caused by herbivory activates which types of ion channels?

#Question id: 10539

#I Life Science/ Life Sciences Group – I-V

All plants releases green-leaf volatiles in response to mechanical damage, this volatile is a mixture of

#Question id: 10539

#SCPH05 I Biotechnology

All plants releases green-leaf volatiles in response to mechanical damage, this volatile is a mixture of

#Question id: 10540

#I Life Science/ Life Sciences Group – I-V

The following statements are made regarding volatile compounds of plant;

a) secondary metabolites also fuction in defence mechanism but this is not the volatile compound

b) These volatiles can act as cues for natural enemies of the insect herbivore such as parasitic wasps

c) All plants releases green-leaf volatiles in response to mechanical damage that is a mixture of aldehydes, alcohols, and esters

d) These volatiles attracts natural enemies of the attacking insect herbivores—predators or parasites

Which one of the following options represents a combination of correct statements?