genetic control of body plan development

Question 1

what is apoptosis

Answer 1

progranned cell death

Question 2

what is a homeobox sequence

Answer 2

sequence of 180 base pairs found in genes that are involved in regulating patterns of anatomical development

Question 3

what is a hox genes

Answer 3

subset of homeobox genes, found only in animals involved to form anatomical features

Question 4

how many dna base pairs are in a homeobox sequence

Answer 4

180

Question 5

what experiment discovered that homeobox gene sequences are highly conserved

Answer 5

experiment found that homeobox gene sequences in fruit fly also exist in mouse, and they are both similar- meaning the gene sequences are crucial for development

Question 6

how are hox genes arranges

Answer 6

arranged in clusters

Question 7

what axis are hox genes expressed in

Answer 7

along the anterior-posterior axis of the developing embryo.

Question 8

the sequence of hox gene expressions correspond to the …

Answer 8

development of various body parts.

Question 9

how are hox genes regulated

Answer 9

regulated by gap genes, in turn these genes are regulated by mrna from egg cytoplasm

Question 10

what is the sequence of events during cell apoptosis

Answer 10

1- enzymes break down cell cytoskeleton
2- the cytoplasm becomes dense
3- plasma membrane changes and blebs form
4- chromatin condenses, nucleus breaks to fragments
5- cell breaks into vesicles which are ingested by phagocytes