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TLS Online TPP Program
#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?
TLS Online TPP Program
#Question id: 11575
#Unit 7. System Physiology – Animal
Fight-or-flight reactions include activation of the ________.
TLS Online TPP Program
#Question id: 10677
#Unit 10. Ecological Principles
What interactions occur in epiphyte plants that grow on other plants?
TLS Online TPP Program
#Question id: 19808
#Unit 12. Applied Biology
Pathogen-derived resistance (PDR) has been realized in the cases of
1. Bacterial diseases
2. Fungal diseases
3. Plant diseases
4. Viral diseases
Which of the following options is incorrect?
TLS Online TPP Program
#Question id: 813
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following does NOT impose limits on protein folding?