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Unformatted text preview: segmentation during Drosophila development every segment
has an “identity”:
6 head segments,
3 thoracic (T1-T3),
8 abdominal (A1-A8) identity crisis: T3 segment
develops like a T2 segment wild type “bithorax mutant”
(homozygous ubx null, recessive) wild type dominant Antp mutant phenotype:
antennae transformed into legs...
because Antp gene is ectopically
expressed in developing
Interpretation of wild type
gene function is tricky if all you have is a dominant
allele… usually gain of
function (semi-dominant may
also be gain of fu...
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This note was uploaded on 01/16/2012 for the course BICD 100 taught by Professor Nehring during the Fall '08 term at UCSD.
- Fall '08