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24 Cards in this Set

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What 3 things are needed to give you testis?
1. Testosterone
2. MIF
3. Sry gene encoding TDF (Testis determining factor)
List the events taking place in Meiosis I:
1. Pairing of 46 homo chromes
2. Crossing over
3. Disjunction: w/o centromere splitting
Meiosis I causes a:
Reduce in number
46--> 23
Meiosis II causes a:
Reduce in ploidy
2N --> 1N
List the events taking place in Meiosis:
Disjunction WITH centromere splitting
What stage is an egg in if a patient ovulates but the egg is not fertilized:
Secondary oocyte did nto complete meiosis II
All primary oocytes are formed by 5 months and are stored in what form until puberty?
Meiosis I prophase
Secondary oocytes are arrested in what state after puberty?
Meiosis II Metaphase
Fertilization of a secondary oocyte means it has?
Completed Meiosis II to form a mature oocyte and polar body
A blastocyst splits into:
Embryoblast and Trophoblast
Trophoblasts split into:
Cytotrophoblast and Syncitiotrophoblast

Embryoblast becomes the embryo
Blastocyst is characterized by a:
Fluid filled cavity
Embryoblast becomes:
Trophoblast becomes:
Embryo
Placenta
What layer must degenerate for implantation to occur?
Zona pellucida
The blastocyst implants in the functional layer of the endometrium during what phase of the cyle?
Progestational phase
Embryoblast splits into:
Epiblast and Hypoblast
Mitosis takes place in what division of the trophoblast?
Cyto
What division of the trophoblast makes HCG?
Syncytio
The future mouth starts as:
Prochordal plate
Zygote:
Embryo:
Fetus:
1-2 wks
3-8 wks
Rest
The first missed menstrual period signifies what week of embryonic development?
Week 3
What is a chordoma?
Tumor of the remnants of the notochord found in the sacral region
List derivatives from the Neural Crest:
AM
Ganglia
Schwann Cells
Meninges
Pharyngeal arch cartilage
List derivatives from the Neuroectoderm:
All neurons
Retina
Neurohypophysis
Astrocytes
Oligodendrocytes