TLS Online TPP Program
More Questions
TLS Online TPP Program
#Question id: 15154
#SCPH01 Biochemistry
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 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.
TLS Online TPP Program
#Question id: 4572
#SCPH06 I Botany
Of the following anatomical structures, which is homologous to the wing of a bird?
TLS Online TPP Program
#Question id: 10519
#I Life Science/ Life Sciences Group – I-V
Which of the following toxins derived from the fungus Cochliobolus carbonum inhibits specific histone deacetylases in maize?
TLS Online TPP Program
#Question id: 4168
#SCPH01 Biochemistry
The deaminoacylated tRNA leaves the ribosome as the growing polypeptide passes through the tunnel of the large ribosomal subunit from the __.
TLS Online TPP Program
#Question id: 11452
#SCPH28 | Zoology
A given photon of light may trigger an action potential with thousands of times more energy because the signal strength is amplified by ________.