Chapter 19 Flashcards
1
Q
What are hox genes
A
Hox genes are genes responsible for the development of body plans
2
Q
What are the features of hox genes
A
Hox genes have highly conserved parts in plants animals and fungi called homeobox sequences this means body plan development is similar in each and has not been affected by evolution
3
Q
How do hox genes control development
A
Homeobox sequence codes for a homeodomain protein
It binds to sites on DNA of developmental genes as a transcription factor
This activates/represses transcription which alters proteins involved in body plan development
4
Q
What is apoptosis
A
Apoptosis is programmed cell death
Cell components are broken down by enzymes
The cell shrinks and breaks into fragments
These are engulfed by phagocytes
