genetic control Flashcards
what is a homeobox gene?
genetic sequence which create proteins that regulate expression of other genes involved in the early development of body formation in the embryo
genetic control is important because ….
it determines development of features
homeobox genes code for …. in order to ….
transcription factors
regulate gene expression important in development
what are hox genes?
groups of homeobox genes found in animals
homeobox genes are …. which means ….
highly conserved
they have not evolved much
what is the role of hox genes?
- responsible for correct body development and body part positions
- ordered in which effects are expressed
many animal bodies are …. and have ….
segmented
symmetry
what is the importance of mitosis in genetic control?
increases cell number which results in growth
what is apoptosis?
programmed cell death and removes unwanted cells
the cell cycle is controlled by …. so new cells are only made when needed for …. which …..
genes
growth and repair
prevents tumour growth and conserves energy
when does apoptosis occur?
- if the cell is old
- if an error in the cell cycle is detected
mitosis and apoptosis is regulated by ….. genes which are impacted by …..
hox
internal and external
how does apoptosis work?
- breaks up contents eg nucleus
- cell membrane shrinks into projections called blebs
what does the bleb turn into?
apoptotic body
- contains an organelle or types of organelles
apoptotic bodies are engulfed by ….
phagocytes
