Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
8 Cards in this Set
- Front
- Back
|
What is the only monosomy with a viable phenotype? What is the name of this condition, what are the symptoms?
|
turner syndrome - single X chromosome. female, short with webbed necked, gonadal dysgenesis and no sexual maturation
|
|
|
which three (autosomal) chromosomes have associated trisomies?
|
18, 13, and 21
|
|
|
What is the karyotype of Klinefelter syndrome? What are some of the symptoms?
|
XXY - sterility, tall, gynecomastia
|
|
|
Which two syndromes are caused by microdeletions on chromosome 15?
|
maternal - Angelman syndrome (retardation, cant speak, poor motor development, laughing spells), Paternal - prader willi syndrome (hypotonia, obesity, retardation, hypogonadism)
|
|
|
what is the trophoblast? Describe the two layers it develops into
|
outer layer of cells of the blastocyst. in the second week, its layers are the synctiotrophoblast - multinucleated outer layer that maternal sinusoids grow into. cytotrophoblast - inner layer that develops into villi lining
|
|
|
In which areas do mesodermal cells not invade between the epiblast and hypoblast?
|
The buccopharyngeal and cloacal membranes.
|
|
|
what is the embryonic cause of caudal dysgenesis?
|
insufficient mesodermal cell development in the caudal embryo - causes malformations of lower limbs, urogenital systems, and sacrolumbar vertebrae
|
|
|
what is a sacrococcygeal teratoma? what embryologic defect causes it?
|
differentiated tumors on the sacral region, caused by pluripotent cells of the primitive streak that remain and continue proliferating
|
