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Fly Eye - Rosy Pigment

Results for Rosy

Figure 1.

Rosy male left and purple female right.

Rosy male left and purple female right.

Position of Rosy

Rosy crossed with purple

Table 1. Results of red (wild), purple, and rosy reciprocal crosses

P red eye (f) RR X rosy eye (m) rr
F1 red eye (f) Rr X rosy eye (m) Rr

 1.

      Observed Expected
F2 red eye (f) R_ 99 115
  red eye (m) R_ (male and females included in above)
  rosy eye (f) rr 54 38
  rosy eye (m) rr (male and females included in above)
  TOTAL  

153

CHISQ.TEST = 0.003 for hypothesis that rosy segregates autosomally 

2.

P rosy eye (f) rr X red eye (m) RR
F1 red eye (f) Rr X red eye (m) Rr

 

      Observed Expected
F2 red eye (f) R_ 35  35.25
  red eye (m) R_ (both sexes included above)
  rosy eye (f) rr 12  11.75
  rosy eye (m) rr (both sexes included above)
  TOTAL    47

CHISQ.TEST = 0.932 for hypothesis that rosy segregates autosomally 

3.

P red eye (f) PP X purple eye (m) pp
F1 red eye (f) Pp X red eye (m) Pp

 

      Observed Expected
F2 red eye (f) P_ 95 82
  red eye (m) P_ (male and females included in above)
  purple eye (f) pp 14 27
  purple eye (m) pp (male and females included in above)
  TOTAL   109

CHISQ.TEST = .004 for hypothesis that purple segregates autosomally 

4.

P purple eye (f) pp X red eye (m) PP
F1 red eye (f) Pp X red eye (m) Pp

 

      Observed Expected
F2 red eye (f) P_ 97 94
  red eye (m) P_ (male and females included in above)
  purple eye (f) pp 29 32
  purple eye (m) pp (male and females included in above)
  TOTAL   126

CHISQ.TEST = .539 for hypothesis that purple segregates autosomally 

5.

P rosy eye (f) rrPP X purple eye (m) RRpp
F1 red eye (f) RrPp X red eye (m) RrPp

 

      Observed Expected
F2 red eye (f) R_P_ 35 52
  red eye (m) R_P_ (male and females included in above)
  rosy eye (f) rrP_ 44 17
  rosy eye (m) rrP_ (male and females included in above)
  purple eye (f) R_pp 14 17
  purple eye (m) R_pp (male and females included in above)
  unknown (f) rrpp none observed 5.8
  unknown (m) rrpp 0    (expected for both sexes above)
  TOTAL   93

CHISQ.TEST = 0.000 for hypothesis that purple and rosy segregate autosomally and independently so that double homozygotes are rosy

6.

P purple eye (f) RRpp X rosy eye (m) rrPP
F1 red eye (f) RrPp X red eye (m) RrPp

 

      Observed Expected
F2 red eye (f) R_P_ 264 241
  red eye (m) R_P_ (male and females included in above)
  rosy eye (f) rrP_ 98 80
  rosy eye (m) rrP_ (male and females included in above)
  purple eye (f) R_pp 67 80
  purple eye (m) R_pp (male and females included in above)
  unknown (f) rrpp none observed 27
  unknown (m) rrpp 0 (expected for both sexes above)
  TOTAL   429

CHISQ.TEST - 0.080 for hypothesis that purple and rosy segregate autosomally and independently so that double homozygotes are rosy 

 



 

 

 

Pigments of rosy

Figure 1. Rosy X with cinnabar.

Figure 1. Result of rosy X cinnabar cross. A male homozygous for rosy and cinnabar is pictured. These double mutations were extremely rare and only males were found. The fly can be compared to a rosy chromatogram. Cinnabar blocks brown pigment production, but the pteridines present in rosy give the eye a brownish appearance which darkens with age.

Male rosy chromatogram:

Femae sepia chromatogram

Homozygous rosy X cinnabar male taken November 14, 2016:

Homozygous sepia X cinnabar female

Figure 2. Rosy X with vermilion.

Results of rosy X vermilion cross. Vermilion blocks all brown pigment production and rosy prevents production of most orange drosopterin pigment but not all pteridine pigments, giving rise to a brownish appearance which darkens with age. The chromatogram is for a rosy male. The fly seen here is a male that is homozygous for both rosy and vermillion

 

Sepia Female chromatogram

Figure 3. Rosy and vermilion double homozygote.

The male fly pictured here is also from a rosy X vermilion cross and also a double homozygote for rosy and vermilion.

Vermillion X sepia f3 double homozygous female left and male right

Rosy crossed with cinnabar

Table 1.Results of red, rosy, and cinnabar reciprocal crosses. No sex-linkage is seen.

P red eye (f) RR X rosy eye (m) rr
F1 red eye (f) Rr X red eye (m) Rr

 1. (see above cross 1)

      Observed Expected
F2 red eye (f) R_    
  red eye (fm) R_ (male and females included in above)
  rosy eye (f) rr    
  rosy eye (m) rr (male and females included in above)
  TOTAL    

CHISQ.TEST =  for hypothesis that rosy segregates autosomally


 2. (see above cross 2)

P rosy eye (f) rr X red eye (m) RR
F1 red eye (f) Rr X red eye (m) Rr

 

      Observed Expected
F2 red eye (f) R_    
  red eye (m) R_ (male and females included in above)
  rosy eye (f) rr    
  rosy eye (m) rr (male and females included in above)
  TOTAL    

CHISQ.TEST =  for hypothesis that rosy segregates autosomally

 3.

P red eye (f) NN X cinnabar eye (m) nn
F1 red eye (f) Nn X red eye (m) Nn

 

      Observed Expected
F2 red eye (f) N_  63  70
  red eye (m) N_ (male and females included in above)
  cinnabar eye (f) nn  30  23
  cinnabar eye (m) nn (male and females included in above)
  TOTAL    93

CHISQ.TEST = .092 for hypothesis that cinnabar segregates autosomally

 4.

P cinnabar eye (f) nn X red eye (m) NN
F1 red eye (f) Nn X red eye (m) Nn

 

      Observed Expected
F2 red eye (f) N_    
  red eye (m) N_ (male and females included in above)
  cinnabar eye (f) nn    
  cinnabar eye (m) nn (male and females included in above)
  TOTAL    

CHISQ.TEST =  for hypothesis that cinnabar segregates autosomally

 5.* 

P rosy eye (f) rrNN X cinnabar eye (m) RRnn
F1 red eye (f) RrNn X red eye (m) Rrnn

 

      Observed Expected
F2 red eye (f) R_N_  125  81
  red eye (m) R_N_ (male and females included in above)
  rosy eye (f) rrN_  9  27
  rosy eye (m) rrN_ (male and females included in above)
  cinnabar eye (f) R_nn  10  27
  cinnabar eye (m) R_nn (male and females included in above)
  yellowish (f) rrnn  0  9
  unknown (m) rrnn 0    (expected for both sexes above)
  TOTAL    

*Note:Examination of additional flies revealed 1 out of 156 to have a light brown to yellowish phenotype expected of a double homozygote

CHISQ.TEST =  for hypothesis that rosy and cinnabar segregate autosomally and independently to produce a fourth phenotype

 6.*

P cinnabar eye (f) RRnn X rosy eye (m) rrNN
F1 red eye (f) RrNn X red eye (m) RrNn

 

      Observed Expected
F2 red eye (f) R_N_  97  78
  red eye (m) R_N_ (males and females included in above)
  rosy eye (f) rrN_  20  26
  rosy eye (m) rrN_ (males and females included in above)
  cinnabar eye (f) R_nn  21 26 
  cinnabar eye (m) R_nn (male and females included in above)
  yellowish (f) rrnn  0  9
  unknown (m) rrnn 0 (expected for both sexes above)
  TOTAL    

*Note: counting of an additional approximately 168 flies revealed 1 light brown to yellowish male.

CHISQ.TEST =  for hypothesis that rosy and cinnabar segregate autosomally and independently to produce a fourth phenotype  crossed with vermilion

Table 2. Results of red, vermilion, and rosy reciprocal crosses. Sex-linkage is observed.

1.

P red eye (f) XLXL X vermilion eye (m) XlY
F1 red eye (f) XLXI X red eye (m) XLY

 

      Observed Expected
F2 red eye (f) XL_ 90 88.0
  red eye (m) XLY 61 43.8
  vermilion eye (f) XIXI 0 0
  vermilion eye (m) XlY 24 43.8
  TOTAL   175

CHISQ.TEST = 0.000 for hypothesis that vermilion is sex-linked

2.

P vermilion eye (f) XIXI X red eye (m) XLY
F1 red eye (f) XLXI X vermilion eye (m) XIY

 

      Observed Expected
F2 red eye (f) XL_ 72 56
  red eye (m) XLY 66 56
  vermilion eye (f) XIXI 56 56
  vermilion eye (m) XlY 29 56
  TOTAL   223

CHISQ.TEST = 0.000 for hypothesis that vermillion is sex-linked

3.

P vermilion eye (f) XlXl RR
X rosy eye (m) XLY rr
F1 red eye (f) XLXi Rr X vermilion eye (m) XIY Rr

 

      Observed Expected
F2 red eye (f) XL_R_ 50 31.2
  red eye (m) XLY_R_ 29 31.2
  vermilion eye (f) XlXl R_ 28 31.2
  vermilion eye (m) XIY R_ 32 31.2
  rosy eye (f) XLXL rr 14 10.4
  rosy eye (m) XLY rr 12 10.4
  unknown (f) XlXl rr 0 10.4
  yellowish (m) XlY rr 1 10.4
  TOTAL   166

CHISQ.TEST = 0.000 for hypothesis that sex-linked vermillion and rosy segregate independently to produce a fourth phenotype

 4.

P rosy eye (f) XLXL rr
X vermilion eye (m) XIY RR
F1 red eye (f) XLXi Rr X red eye (m) XLY Rr

 

      Observed Expected
F2 red eye (f) XL _R_ 181 141
  red eye (m) XLY R_ 104 71
  vermilion eye (f) XlXl R_ 0 0
  vermilion eye (m) XIY R_ 62 71
  rosy eye (f) XLXL rr 17 47
  rosy eye (m) XLY rr 12 24
  unknown (f) XlXl rr 0 0
  yellowish (m) XlY rr 1 24
  TOTAL   377

CHISQ.TEST = 0.000 for hypothesis that sex-linked vermillion and rosy segregate independently.to produce a fourth phenotype

Dr. Stephen Reinbold

Last Modified: 9/5/17