Hox genes Flashcards
1
Q
Homeosis
A
the transformation of one segment into the likeness of another
2
Q
Homeoboxes
A
transcription factors
3
Q
homeobox protein + transcriptional machinery =
A
activation of gene activity
4
Q
Hox genes act in combination to…
A
specify cell identity
5
Q
segment identities are determined by…
A
combined Hox gene activities
6
Q
Drosophila have __ Hox genes
A
8
7
Q
Hox genes control…
A
development in head and neck
8
Q
Paralogues
A
- same gene doing same job across hox gene clusters
9
Q
DNA from different organisms
A
- fragmented by enzymes
- electrophoresis
- nitrocellulose filter (DNA transferred to)
- hybridise with unique DNA marker
- filter in “seal-a-meal” bag
- probe hybridised to complementary sequence
- expose X-ray film to filter
10
Q
Hox gene expression boundaries correlate with…
A
morphological boundaries
11
Q
Value of redundancy
A
development of innovations
- can ‘reuse’ unused ‘parts’ to fix ‘problems’
