#Question id: 15155
#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 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: 456
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following function is done by compartmentation of enzymes?
A) helps loss by diffusion.
B) keeps separate pools of metabolites in cells.
C) can help control metabolic pathways.
#Question id: 11772
#Unit 10. Ecological Principles
Which of the following statements correctly describes the relationship between growth and fecundity in an indeterminate organism?
#Question id: 12768
#Unit 10. Ecological Principles
#Question id: 5199
#Unit 11. Evolution and Behavior
For mapping studies of genomes, most of which were far along before 2000, the 3 -stage method was often used. Which is the usual order in which the stages were performed, assuming some overlap of the three?