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30 Cards in this Set

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Chromatid
each pair of DNA molecules after DNA replication joined at the centromere
chromatin
uncoiled DNA found in interphase cells only involved in making the chromosome
chromosome
tightly coild DNA w/ specific proteins responsible for the storage of genetic info
histone
five kinds of protein forming complexes w/ eukaryote DNA
kinetochore
structure forming at centromere during mitosis for binding microtubules
necleosome
basic structureal unit of chromosome forming "beads on string"
autosome
all homolgous chromosmes except for the sex cells
karyotype
homologous chromosome pairs
ploidy
number of sets of chromosmes ina cell
nondisjunction
homologues don't seperate in meiosis 1
translocation
transfer of peice of one chromosome to another
deletion
loss of fragment of a chromosome
Gonad
site of meiosis
gametes
sex cells
gametogenesis
process by which gametes develop on the gonads
external fertilization
gametes are released and fuse outside the body of the female
internal fertilization
gametes fuse within the body of the femal and zygote develops inside the mom
parthenogenesis
development of an unfertilized adult egg without fusion with sperm
cleavage
initial series of cell divisions prior to cell growth
morula
solid ball of cells in early stages of cleavage
blastula
sphere formed by a single layer of cells during a later stage of Clvge
blastocoel
fluid filled center of the sphere
blastopore
opening to the digestive system
gastrula
a 2 layred embryo formed through gastrulation
differentiation
changing of unspecialized embryonic cells into specialized cells
external developemtn
water-no shell on egg, yolk for food, little care from 'rents land-eggs have hard/rubbery shells most ;rents care for young
internal development
young developes in mother
marsupial
some develope in uterus but most in pouch
placental
embryo developes in uterus and is connect to placenta by umbilical cord
types of reproduction
asexual and sexual