Embryo Weeks 1-8

Front 1

What 3 things are needed to give you testis?

Back 1

1. Testosterone
2. MIF
3. Sry gene encoding TDF (Testis determining factor)

Front 2

List the events taking place in Meiosis I:

Back 2

1. Pairing of 46 homo chromes
2. Crossing over
3. Disjunction: w/o centromere splitting

Front 3

Meiosis I causes a:

Back 3

Reduce in number
46--> 23

Front 4

Meiosis II causes a:

Back 4

Reduce in ploidy
2N --> 1N

Front 5

List the events taking place in Meiosis:

Back 5

Disjunction WITH centromere splitting

Front 6

What stage is an egg in if a patient ovulates but the egg is not fertilized:

Back 6

Secondary oocyte did nto complete meiosis II

Front 7

All primary oocytes are formed by 5 months and are stored in what form until puberty?

Back 7

Meiosis I prophase

Front 8

Secondary oocytes are arrested in what state after puberty?

Back 8

Meiosis II Metaphase

Front 9

Fertilization of a secondary oocyte means it has?

Back 9

Completed Meiosis II to form a mature oocyte and polar body

Front 10

A blastocyst splits into:

Back 10

Embryoblast and Trophoblast

Front 11

Trophoblasts split into:

Back 11

Cytotrophoblast and Syncitiotrophoblast

Embryoblast becomes the embryo

Front 12

Blastocyst is characterized by a:

Back 12

Fluid filled cavity

Front 13

Embryoblast becomes:
Trophoblast becomes:

Back 13

Embryo
Placenta

Front 14

What layer must degenerate for implantation to occur?

Back 14

Zona pellucida

Front 15

The blastocyst implants in the functional layer of the endometrium during what phase of the cyle?

Back 15

Progestational phase

Front 16

Embryoblast splits into:

Back 16

Epiblast and Hypoblast

Front 17

Mitosis takes place in what division of the trophoblast?

Back 17

Cyto

Front 18

What division of the trophoblast makes HCG?

Back 18

Syncytio

Front 19

The future mouth starts as:

Back 19

Prochordal plate

Front 20

Zygote:
Embryo:
Fetus:

Back 20

1-2 wks
3-8 wks
Rest

Front 21

The first missed menstrual period signifies what week of embryonic development?

Back 21

Week 3

Front 22

What is a chordoma?

Back 22

Tumor of the remnants of the notochord found in the sacral region

Front 23

List derivatives from the Neural Crest:

Back 23

AM
Ganglia
Schwann Cells
Meninges
Pharyngeal arch cartilage

Front 24

List derivatives from the Neuroectoderm:

Back 24

All neurons
Retina
Neurohypophysis
Astrocytes
Oligodendrocytes