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