UESTION 6 Drosophila, sepia eyes (se) and stubble bristles (sb) are recessive to the wildtype eyes and bristles (se* and sb*). A male heterozygous for both genes was test crossed to a male homozygous recessive for both genes. The progeny of cross are given below: Phenotypes wildtype eyes and wildtype bristles (set, sbt) widltype eyes and stubble bristles (set, sb) sepia eyes and wildtype bristles (se, sbt) sepia eyes and stubble bristles (se, sb) # of Progeny 334 162 158 346 is the genetic distance (in map units) between these two genes? me alleles in the heterozygous female in the cis (coupling) or trans (repulsion) conformation? e two genes in this problem unlinked, completely linked or incompletely linked?

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QUESTION 6
In Drosophila, sepia eyes (se) and stubble bristles (sb) are recessive to the wildtype eyes and bristles (se* and sb+). A
female heterozygous for both genes was test crossed to a male homozygous recessive for both genes. The progeny of
this cross are given below:
Phenotypes
wildtype eyes and wildtype bristles (set, sbt)
# of Progeny
334
widltype eyes and stubble bristles (set, sb)
162
sepia eyes and wildtype bristles (se, sb+)
158
sepia eyes and stubble bristles (se, sb)
346
What is the genetic distance (in map units) between these two genes?
Are the alleles in the heterozygous female in the cis (coupling) or trans (repulsion) conformation?
Are the two genes in this problem unlinked, completely linked or incompletely linked?
Transcribed Image Text:QUESTION 6 In Drosophila, sepia eyes (se) and stubble bristles (sb) are recessive to the wildtype eyes and bristles (se* and sb+). A female heterozygous for both genes was test crossed to a male homozygous recessive for both genes. The progeny of this cross are given below: Phenotypes wildtype eyes and wildtype bristles (set, sbt) # of Progeny 334 widltype eyes and stubble bristles (set, sb) 162 sepia eyes and wildtype bristles (se, sb+) 158 sepia eyes and stubble bristles (se, sb) 346 What is the genetic distance (in map units) between these two genes? Are the alleles in the heterozygous female in the cis (coupling) or trans (repulsion) conformation? Are the two genes in this problem unlinked, completely linked or incompletely linked?
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