lecture 7

Question 1

Male drosophila have ______ on their forelimbs, and ________

Answer 1

sex combs

dark abdomens

Question 2

Female drosophila ovaries are called

Answer 2

ovarioles (egg chambers) Oogenesis occurs here.

Question 3

The female can store the male sperm in the

Answer 3

spermatheca

Question 4

The oogonium divides 4x producing

Answer 4

16 cell with connections, each cell is a cystocyte

Question 5

each cystocyte has special structures called

Answer 5

ring canals

Question 6

The fist 2 cystocytes formed have

Answer 6

4 ring canals, one of these will become the oocyte

Question 7

During the formation of the oocyte, 15 ________ will be formed

Answer 7

nurse cells

Question 8

Nurse cells develop

Answer 8

polytene chromosomes (DNA replication without cell division)

Question 9

drosophila fertilization- sperm, stored in female, enters opening in ______ called the _____

Answer 9

chorion, micropyle

Question 10

Drosophila Early Development- Nuclei divide and migrate forming ______. The Nuclei are _____ at this point.

Answer 10

synctial blastoderm, totipotent

Question 11

totipotent

Answer 11

Can become any cell, including embryonic cells

Question 12

pluripotent

Answer 12

can become any cell in the body, except embryonic cells

Question 13

multipotent

Answer 13

can become several cell types, but it more limited

Question 14

multipotent

Answer 14

can become several cell types, but it more limited

Question 15

once _____ occurs nuclei become determined

Answer 15

cellularization

Question 16

The primordial germ cells are formed from the

Answer 16

pole plasm

Question 17

If pole cells are removed?

Answer 17

No gametes develop

Question 18

Drosophila Gastrulation

Answer 18

1. Ventral furrow forms

2. Propective endoderm at ends of ventral furrow invaginate

Question 19

Drosophila Gastrulation

Answer 19

1. Ventral furrow forms

2. Prospective endoderm at ends of ventral furrow invaginate

Question 20

Drosophila Gastrulation

Answer 20

1. Ventral furrow forms
2. Prospective endoderm at ends of ventral furrow invaginate
3. Embryo bends forming
4. Cephalic furrow
5. Some ventral cells ingress (later form nervous system)