7. DNA and Chromosome Structure
Eukaryotic Chromosome Structure
2:49 minutes
Problem 20
Textbook Question
Textbook QuestionIn a study of Drosophila, two normally active genes, w⁺ (wild-type allele of the white-eye gene) and hsp26 (a heat-shock gene), were introduced (using a plasmid vector) into euchromatic and heterochromatic chromosomal regions, and the relative activity of each gene was assessed [Sun et al. (2002)]. An approximation of the resulting data is shown in the following table. Which characteristic or characteristics of heterochromatin are supported by the experimental data? Gene Activity (relative percentage) _ Euchromatin Heterochromatin hsp26 100% 31% w⁺ 100% 8%
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