Genetics help. Please help. Give a good explanation for 3 and 4. Thank you. 3 mu

Question

Genetics help. Please help. Give a good explanation for 3 and 4. Thank you.

3 mutations is shown below. How many genes do these six mutations define? Which mutants belong to the same complementation groups? Complementation analyses of six newly identified white-eye Drosophila 4 4 4 A new operon is discovered in which Y is the enzyme whose expression is being regulated by the genes b and j. They have the following properties: Activity (+) or inactivity (-) of the Y gène Inducer absent Inducer present Genotype bt j+ Y+ b- j+ Y+ b- jt Y+/F(b+) Which genetic element in the lac operon does b most closely resemble? Which genetic element in the lac operon does j most closely resemble? Explain your reasoning.

Explanation / Answer

3. From the table,

So, 1, 3, 5 are in the same group.

So, 4 and 6 are in the same group.

Group1 : 1, 3, 5

Group2: 4, 6

Group3: 2

There are 3 complementation groups. So there are 3 genes.

4. Since b does not work in trans, b resembles operator.

Since j works in trans, j resembles repressor.

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