Terms : Hide Images
| 8525510791 | chromosome theory of inheritance | a basic principle in biology stating that genes are located on chromosomes and that the behavior of chromosomes during meiosis accounts for inheritance patterns | 0 | |
| 8525510792 | wild type | an individual with the phenotype most commonly observed in natural populations; also refers to the phenotype itself | 1 | |
| 8525510793 | sex-linked gene | a gene located on a sex chromosome (usually the X chromosome), resulting in a distinctive pattern of inheritance | 2 | |
| 8525510794 | duchenne muscular dystrophy | a human genetic disease caused by a sex-linked recessive allele; characterized by progressive weakening and a loss of muscle tissue | 3 | |
| 8525510795 | hemophila | a human genetic disease caused by a sex-linked recessive allele resulting in the absence of one or more blood-clotting proteins; characterized by excessive bleeding following injury | 4 | |
| 8525510796 | linked genes | genes located close enough together on a chromosome that they tend to be inherited together | 5 | |
| 8525510797 | genetic recombination | general term for the production of offspring with combinations of traits that differ from those found in either parent | 6 | |
| 8525510798 | parental type | an offspring with a phenotype that matches one of the parental phenotypes; also refers to the phenotype itself | 7 | |
| 8525510799 | recombinant type (recombinant) | an offspring whose phenotype differs from that of the parents; also refers to the phenotype itself | 8 | |
| 8525510800 | crossing over | the reciprocal exchange of genetic material between nonsister chromatids during prophase I of meiosis | 9 | |
| 8525510801 | genetic map | an ordered list of genetic loci (genes or other genetic markers) along a chromosome | 10 | |
| 8525510802 | linkage map | a genetic map based on the frequencies of recombination between markers during crossing over of homologous chromosomes | 11 | |
| 8525510803 | map units | a unit of measurement of the distance between genes. one map unit is equivalent to a 1% recombination frequency | 12 | |
| 8525510804 | cytogenic maps | a chart of a chromosome that locates genes with respect to chromosomal features distinguishable in a microscope | 13 | |
| 8525510805 | nondisjunction | an error in meiosis or mitosis in which members of a pair of homologous chromosomes or a pair of sister chromatids fail to separate properly from each other | 14 | |
| 8525510806 | aneuploidy | a chromosomal aberration in which one or more chromosomes are present in extra copies or deficient in number | 15 | |
| 8525510807 | monosomic | referring to a cell that has only one copy of a particular chromosome instead of the normal two | 16 | |
| 8525510808 | trisomic | referring to a diploid cell that has three copies of a particular chromosome instead of the normal two | 17 | |
| 8525510809 | polyploidy | a chromosomal alteration in which the organism possesses more than two complete chromosome sets. it is the result of an accident of cell division | 18 | |
| 8525510810 | deletion | a deficiency in a chromosome resulting from the loss of a fragment through breakage; a mutational loss of one or more nucleotide pairs from a gene |  | 19 |
| 8525510811 | duplication | an aberration in chromosome structure due to fusion with a fragment from a homologous chromosome, such that a portion of a chromosome is duplicated |  | 20 |
| 8525510812 | inversion | an aberration in chromosome structure resulting from reattachment of a chromosomal fragment in a reverse orientation to the chromosome from which it originated |  | 21 |
| 8525510813 | translocation | an aberration in chromosome structure resulting from attachment of a chromosomal fragment to a nonhomologous chromosome |  | 22 |
| 8525510814 | down syndrome | a human genetic disease caused by the presence of an extra chromosome 21; characterized by mental retardation and heart and respiratory defects | 23 | |
| 8525510815 | klinefelter syndrome | XXY, people with this disorder have male sex organs, but the testes are abnormally small and the man is sterile | 24 | |
| 8525510816 | turner syndrome | XO, people with this disorder are phenotypically female, they are sterile because their sex organs do not mature | 25 |
