# GATE2014-47

In a genetic cross between the genotypes $WWXX$ and $\text{wwxx}$, the following phenotypic distributions were observed among the $F_2$ progeny: $\text{WX, 562; wx, 158; WX, 38; and wX, 42}$. Likewise, a cross between $XXYY$ and $\text{xxyy}$ yielded the following results: $\text{XY, 675; xy, 175; Xy, 72; and xY, 78.}$ Similarly, a cross between $WWYY$ and $\text{wwyy}$ yielded: $\text{WY, 292; wy, 88; Wy, 12; and wY, 8.}$ In all the genotypes, capital letters denote the dominant allele. Assume that the F1 progeny were self-fertilized in all three crosses. Also, double cross-over does not occur in this species. Which of the following is correct?
1. Relative position: $\text{W-X-Y}$ Distances: $\text{W-X = 5}$ map units, $\text{X-Y = 17}$ map units
2. Relative position: $\text{X-Y-W}$ Distances: $\text{X-Y = 15}$ map units, $\text{Y-W = 11}$ map units
3. Relative position: $\text{Y-W-X}$ Distances: $\text{Y-W = 5}$ map units, $\text{W -X = 11}$ map units
4. Relative position: $\text{X-W-Y}$ Distances: $\text{X-W = 5}$ map units, $\text{W-Y = 10}$ map units