1-7-09 vocab
Terms
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- Lethal Mutation
- mutation that causes the death of an organism.
- Triploid
- consists of three sets of chromosomes
- Aneupolid
- an organism in which the chromosome number is not an exact multiple of the haploid number.
- Tetraploid
- having four complete sets of chromosomes (genotypes).
- Inversion
- chromosomal mutation in which genes break off a section of DNA and reattach but in the opposite order
- Euploidy
- a chromosomal change that involves the loss of entire genomes.
- Down syndrome (trisomy 21)
- a genetic disorder caused by a trisomy of the twenty-first chromosome
- Deletion
- mutation involving the loss of a segment of a chromosome during replication; a mutation involving the loss of a nucleotide from a DNA chain.
- Colchicine
- a poison that disrupts the spindle fibers during cell division, resulting in polypeptide cells.
- Translocation
- the transfer of a chromosome segment to a homologous chromosome; the movement of dissolved carbohydrates in plants.
- Nondisjunction
- the failure of a pair of homologous chromosomes to separate during meiosis
- Trisomy
- an abnormal condition in which there are three chromosomes in a set of two.
- Gene Mutation
- a changing of the gene itself, which alters the sequence of nucleotide bases within a gene.
- Monosomy
- a condition in which only one of the homologous pair of chromosomes.
- Parthenogenesis
- in which organisms develop from unfertilized ova
- Genome
- - the genetic makeup of an individual organism.
- Polypoid
- a cell or organism that has multiple genotypes
- Mutation
- Random Change in a DNA molecule.