Increased chiasma frequency as a result of chromosome rearrangement

  title={Increased chiasma frequency as a result of chromosome rearrangement},
  author={John S. Parker},
The effects of structural chromosome changes on chiasma frequency have been studied in a single family of the plant Hypochoeris radicata 2n = 8 segregating for two rearrangements: fission of chromosome 1 and interchange between chromosomes 1 and 2. In the family seven karyotypically-distinct groups of offspring can be distinguished which has enabled comparisons of chiasma effects to be made independent of genetic background. Both fission and interchange heterozygotes have an increase of about 0… CONTINUE READING