Leys - Early Development

Question 1

What are the 4 essential processes needed to develop from a single cell into a multicellular organism?

Answer 1

cell proliferation
cell specialization
cell interaction
cell movement

Question 2

When determining cell fates, you can analyze when a cell _______ into a certain lineage via ________

Answer 2

differentiates

transplantation

Question 3

If you transplant a section from a donor to a host before it becomes _______ (or determined), then it will become whatever section it is transplanted into

Answer 3

fated

Question 4

True or False
If you transplant a section from a donor to a host after it become fated (or determined), it will still develop into whatever it was transplanted to

Answer 4

False; once a cell type has become “fated” it will develop into that fate, regardless of where it is transplanted; for example; in drosophila, transplanting fated leg tissue to a wing bud will cause a leg to grow on the wing

Question 5

True or False
There are few similarities between developmental genes among different organisms; i.e. each organism has developed their own special developmental genes

Answer 5

False; there are many similarities between developmental genes of different organisms

Question 6

_______ genes direct regions (or segments) to differentiate into their final forms

Answer 6

homeotic

Question 7

Genes can have complex ______ patterns by having a series of _____ ______ directing transcription in different regions of the organism

Answer 7

expression

control regions

Question 8

Homeotic genes are arrayed on the chromosome in the _____ spatial order as they are expressed in developing embryos and in the _____ order in drosophila and humans

Answer 8

same

same