Lecture 23

Question 1

2 general classes of cell division that occur within us

Answer 1

symmetric asymmetric

Question 2

2 ways of asymmetric cell division

Answer 2

daughter cells are distinct from parents & one daughter cell is identical to parent cell and other is different

Question 3

Cell lineage

Answer 3

route the differentiated cell took to get where it’s at from the starting stem cell

Question 4

Fertilization

Answer 4

Restores the gametes into the normal diploid state (complete genome)

Question 5

What cell stage of fertilized cells are totipotent

Answer 5

until compacted morula

Question 6

What cell stage of fertilized cells are pluripotent

Answer 6

blastocyst and onward

Question 7

two germ layers of blastocyst

Answer 7

trophectoderm and inner cell mass

Question 8

Totipotent

Answer 8

cells can become absolutely anything

Question 9

Multipotent

Answer 9

somatic stem cells give rise to both stem cells and differentiating cells

Question 10

Pluripotent

Answer 10

capable of giving rise to several different cell types

Question 11

Unipotent

Answer 11

progenitors, determined what the cell will become

Question 12

transcription factors that control the pluripotency of embryonic stem cells?

Answer 12

Sox2, Oct4, Nanog

Question 13

stem cell niche

Answer 13

provide signals to maintain a population of undifferentiated stem cells but prevent excess proliferation