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;
15 Cards in this Set
- Front
- Back
|
Chromatin
|
All DNA molecules and associated proteins in a nucleus
|
|
|
Chromatid
|
An unduplicated strand in the chromosome pair.
|
|
|
Chromosome
|
A coherent structire consisting of DNA
|
|
|
Placenta
|
Organ that forms from endometrial tissue and extraembryonic membranes. Allows exchagne of substances between mother and baby and keeping bloodstreams separate.
|
|
|
Centromere
|
Constricted part of a chromosome to which spindle microtubules attach
|
|
|
Spindle Fiber
|
Segregates chromosomes during cell division.
|
|
|
Homologous Chromosome
|
Meaning members of the same pair.
|
|
|
Crossing Over
|
The exchange of genetic material between chromosomes in a homologous pair.
|
|
|
Haploid
|
A gamete has this number of chromosomes. (n)
|
|
|
Diploid
|
The double chromosome number of a zygote. (2n)
|
|
|
Gamete
|
Sex cell (sperm, egg).
|
|
|
Zygote
|
Fertilized egg.
|
|
|
Blastocyst
|
After many cell divisions, this is an early embryo before implantation. It possesses an inner mass of cells.
|
|
|
Embryonic Membranes
|
Chorion- surrounds all membranes, later forms into placenta
Amnion- surrounds embryo and later the fetus, fluid-filled for shock absorption Yolk Sac- stores organic nutrients Allantois- stores wastes |
|
|
Embryonic Tissues
|
Ectoderm- embryonic skin and nervous system
Mesoderm- embryonic circulatory, muscle, and skeletal systems Endoderm- embryonic lining of the digestive, respiratory, and urinary systems |
