Assume That Investigators Crossed a Strain of Flies Carrying the Dominant

question 35

Essay

Assume that investigators crossed a strain of flies carrying the dominant eye mutation Lobe on the second chromosome with a strain homozygous for the second chromosome recessive mutations smooth abdomen and straw body. The F₁ Lobe females were then backcrossed with homozygous smooth abdomen, straw body males, and the following phenotypes were observed:
smooth abdomen, straw body 820
Lobe 780
smooth abdomen, Lobe 42
straw body 58
smooth abdomen 148
Lobe, straw body 152
a) Give the gene order and map units between these three loci.
b) What is the coefficient of coincidence?

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Definitions:

Activity Variance

The difference between budgeted and actual activity levels, used in managerial accounting to monitor performance and control costs.

Net Operating Income

The income generated from normal business operations after subtracting operating expenses but before interest and taxes.

Spending Variance

The discrepancy between the budgeted or planned amount of expense and the actual amount spent, often analyzed to understand financial performance.

Materials

The raw goods and components used in the manufacturing or production process to create final products.