#Question id: 15155
#SCPH12 I Genetics
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 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 parallel with dominant mutations in both genes, determine the phenotype of the F1 progeny and the expected phenotypic ratio of red to white eyed insects in the F2.
#Question id: 5265
#SCPH28 | Zoology
The mechanism by which genes are transferred into bacteria via viruses is called
#Question id: 4970
#SCPH06 I Botany
If two continental land masses converge and are united, then the collision should cause
#Question id: 15212
#SCPH01 Biochemistry
#Question id: 1751
#SCPH05 I Biotechnology
Which of the following is characteristically produced by the Th2 CD4 cells which provide help for antibody production, but not by Th1 cells?