Boom and Bust 1920-1941

Topics: Chromosome, Gene, Human Pages: 2 (559 words) Published: February 8, 2013
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1.aneuploidy: a chromosomal aberration in which one or more chromosomes are present in extra copies or are deficient in number. 2.barr body: a dense object lying along the inside of the nuclear envelope in female mammalian cells, representing an inactivated X chromosome. 3.chromosome theory of inheritance: generalization that genes are located on chromosomes and that the behavior of chromosomes during meiosis and fertilization accounts for inheritance patterns 4.crossing over: process in which homologous chromosomes exchange portions of their chromatids during meiosis 5.cytogenetic maps: a chart of a chromosome that locates genes with respect to chromosomal features distinguishable in a microscope 6.deletion: change to a chromosome in which a fragment of the chromosome is removed 7.down syndrome: trisomy 21

8.duchenne muscular dystrophy: deleted dystrophin gene (X-linked recessive) 9.genetic map: an ordered list of the genetic loci along a particular chromosome 10.genetic recombination: the regrouping of genes in an offspring that results in a genetic makeup that is different from that of the parents 11.genomic imprinting: a phenomenon in which expression of an allele in offspring depends on whether the allele is inherited from the male or female parent 12.haplo diploid system: there are no sex chromosomes in most species of bees and ants. Females develop from fertilized eggs (diploid) and males develop from unfertilized eggs (haploid) 13.hemophilia: an X-linked recessive disorder in which blood fails to clot properly, leading to excessive bleeding if injured. 14.inversion: (genetics) a kind of mutation in which the order of the genes in a section of a chromosome is reversed 15.linkage map: a genetic map based on the frequencies of recombination between markers during crossing over of homologous chromosomes. 16.linked genes: genes located on the same chromosome that tend to be inherited...
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