Problem Set 4 - Answers

Problem Set 4 - Answers - A) Eight genes called 1 to 8 are...

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A) Eight genes called 1 to 8 are present in a linear fashion (i.e. 1-2-3-4-5-6-7-8) on chromosome 2 of Arabidopsis. Strain A is homozygous for recessive mutation for all eight alleles as well as homozygous for an inversion whose breakpoints (exactly in the middle of each interval) occurred between the 2-3 genes and the 5-6 genes. Each of these genes is 5 map units apart from its neighbor. You cross the A strain to a strain containing the same inversion but otherwise WT at all eight loci. Draw out how the homologous chromosomes would pair during meiosis in the F1 heterozygote. What would the observed map distance between: 1 and 8 markers? 3 and 5 markers? 3 and 6 markers? You cross an all wild-type strain (NO inversion) to strain A. Draw out how the homologous chromosomes would pair during meiosis in the F1 heterozygote. What would the observed map distance between: 1 and 8 markers? 3 and 5 markers? 3 and 6 markers?
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Problem Set 4 - Answers - A) Eight genes called 1 to 8 are...

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