Campbell AP Biology 9th edition Chapter 15 vocabulary
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| 1389512967 | aneuploidy | A chromosomal aberration in which one or more chromosomes are present in extra copies or are deficient in number. | 0 | |
| 1389512968 | Barr body | A dense object lying along the inside of the nuclear envelope in cells of female mammals, representing a highly condensed, inactivated X chromosome. | 1 | |
| 1389512969 | Chromosome Theory of Inheritance | A basic principle in biology stating that genes are located at specific positions (loci) on chromosomes and that the behavior of chromosomes during meiosis accounts for inheritance patterns. | 2 | |
| 1389512970 | Crossing Over | The reciprocal exchange of genetic material between non-sister chromatids during prophase I of meiosis. | 3 | |
| 1389512971 | Cytogenetic Map | A map of a chromosome that locates genes with respect to chromosomal features distinguishable in a microscope. | 4 | |
| 1389512972 | Dendrite | One of usually numerous, short, highly branched extensions of a neuron that receive signals from other neurons. | 5 | |
| 1389512973 | Down Syndrome | A human genetic disease caused by the presence of an extra chromosome 21; characterized by mental retardation and heart and respiratory defects. | 6 | |
| 1389512974 | Duchenne muscular dystrophy | A human genetic disease caused by a sex-linked recessive allele; characterized by progressive weakening and a loss of muscle tissue. | 7 | |
| 1389512975 | 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. | 8 | |
| 1389512976 | genetic map | An ordered list of genetic loci (genes or other genetic markers) along a chromosome. | 9 | |
| 1389512977 | genetic recombination | General term for the production of offspring with combinations of traits that differ from those found in either parent. | 10 | |
| 1389512978 | 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. | 11 | |
| 1389512979 | hemophilia | 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. | 12 | |
| 1389512980 | inversion | An aberration in chromosome structure resulting from reattachment of a chromosomal fragment in a reverse orientation to the chromosome from which it originated. | 13 | |
| 1389512981 | linkage map | A genetic map based on the frequencies of recombination between markers during crossing over of homologous chromosomes. | 14 | |
| 1389512982 | linked genes | Genes located close enough together on a chromosome that they tend to be inherited together. | 15 | |
| 1389512983 | map unit | A unit of measurement of the distance between genes. One map unit is equivalent to a 1% recombination frequency. | 16 | |
| 1389512984 | monosomic | Referring to a cell that has only one copy of a particular chromosome instead of the normal two. | 17 | |
| 1389512985 | 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. | 18 | |
| 1389512986 | parental type | An offspring with a phenotype that matches one of the parental phenotypes; also refers to the phenotype itself. | 19 | |
| 1389512987 | 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. | 20 | |
| 1389512988 | sex-linked gene | A gene Located on A sex chromosome (usually the X chromosome), resulting in A distinctive pattern of inheritance. | 21 | |
| 1389512989 | translocation | An aberration in chromosome structure resulting from attachment of a chromosomal fragment to a nonhomologous chromosome. (2) During protein synthesis, the third stage in the elongation cycle when the RNA carrying the growing polypeptide moves from the A site to the P site on the ribosome. (3) The transport of organic nutrients in the phloem of vascular plants. | 22 | |
| 1389512990 | trisomic | Referring to a diploid cell that has three copies of a particular chromosome instead of the normal two. | 23 | |
| 1389512991 | wild type | An individual with the phenotype most commonly observed in natural populations; also refers to the phenotype itself. | 24 | |
| 1389512992 | x-linked genes | A gene located on the X chromosome; such genes show a distinctive pattern of inheritance. | 25 | |
| 1389512993 | recombinant type (recombinant) | An offspring whose phenotype differs from that of the true-breeding P generation parents; also refers to the phenotype itself. | 26 | |
| 1389512994 | deletion | (1) A deficiency in a chromosome resulting from the loss of a fragment through breakage. (2) A mutational loss of one or more nucleotide pairs from a gene. | 27 |
