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Abortion: premature spontaneous expulsion of the fetus from uterus.
aneuploidy: having one more or one less chromosome relative to the parental chromosome number.
autosome: any chrosome of a time that is the same in females a
nd males of the specie.
Crossing over:interaction in which non-sister chromatids of a pair of homologous chromosomes break at corresponding sites.
Deletion: loss of a segment from a chromosome.
Diseas: when difenses aren't mobilized fast enought.
Double-blind study: different investigators independently collect, then compare data.
duplication:gene sequence repeated several to may hundrededs or thousan of times.
genetic abnormality:a rare or less common version of a heritable trait.
genetic disoder: any inherited condition that cause mild to severe medical problems.
genetic recombination:result of any process that puts new genetic information into a DNA molecules.
Homologous Chromoseome: one of a pair of chromosomes identicaly in size,shape, and gene sequence.
in-vitro fertilization: conception outside the body.
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independent assortmen: Mendelian theory that by the end of meiosis, each pair of homologous chromosomes are stored before shipment to gamets independently of how the other pairs were sorted.
inversion: part of the chromosome that became oriented in reverse.
karyotype: preparation of metaphase chromosome sorted by lenght.
Linkage group: all genes of a chromosome.
mosaicism: cells of same type express genes differently.
Non-disjunction: failure of sister chromatids or pair of homologous chromosomes to separate during mitosis or meiosis.
polyploidy: having three or more of each type of chromosomes in the nucleus of a eukaryotc cell.
reciprocal cross: a paired of cross.
sex chromosome:a chromosome with genes that affect sexual trait.
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syndrome:a set of symptoms that may not individually be a telling clue but collectively characterize a genetic disorder or disease.
translocation: movement of a stretch of DNA to a new chromosomal location with no molecular loss.
X & Y chromosome: Are types of sex chromosomes. An XX mamalian embryo becomes female; and a XY embryo becomes male.
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