Diff14 - 13

Question 1

How long is the drosophila life cycle at 25 degrees?

Answer 1

10 days

Question 2

How long is the drosophila life cycle at 18 degrees?

Answer 2

21 days

Question 3

What was the first mutant drosophila discovered?

Answer 3

White eyed - 1910

Question 4

What was the big breakthrough in drosophila research?

Answer 4

Christiane Nusslein-Volhard and Eric Weischaus identifyin genes in development and patterning of larval cuticle

Question 5

When was the drosophila fully mapped?

Answer 5

2006

Question 6

How many species of drosophila have now been sequenced?

Answer 6

21

Question 7

What cells secrete spermatogenesis factors?

Answer 7

Hub cells

Question 8

What signals do hub cells secrete?

Answer 8

Unpaired etc via JAK/STAT pathway

Question 9

Outline oogenesis stem cell maintenance in drosophila

Answer 9

4 incomplete cystoblast meitotic dvisions, selection of future oocyte, endo-reduplication by nurse cells, oocyte meiotic recombination, egg activation meiosis I & II

Question 10

What do nurse cells do?

Answer 10

Endo-reduplication

Question 11

What is endo-reduplication?

Answer 11

DNA replication without cytokinesis

Question 12

Where is the maternal DNA in drosophila?

Answer 12

Proteins & RNAs made in nurse cells and transferred into developing oocyte

Question 13

What is the process of transferring maternal DNA into the developing oocyte in drosophila called?

Answer 13

Cytoplasmic dumping via ring canals