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12.1 Vocab Bio
Chapter 12 Vocab Bio
| Term | Definition |
|---|---|
| sex chromosome | contain genes that determine the sex of an individual |
| autosome | remaining chromosomes that are not directly involved in determining the sex of an individual |
| sex-linked trait | a trait that is coded for by an allele on a sex chromosome |
| linked gene | pairs of genes that tend to be linked together |
| chromosome map | a diagram that shows the linear order of genes on a chromosome |
| map unit | in chromosome mapping, an increment of 1 percent in the frequency of crossing-over |
| germ-cell mutation | mutation that occurs in an organism's gametes |
| somatic-cell mutation | a mutation that occurs in a body cell |
| lethal mutation | a gene of chromosomal mutation that influences the development of an organism in such a way that the organism cannot survive |
| deletion | the loss of a piece of a chromosome due to breakage |
| inversion | is when a chromosomal segment breaks off, flips around backward, and reattaches |
| translocation | is when a piece of one chromosome breaks off and reattaches to a non-homologous chromosome |
| nondisjunction | is when a chromosome fails to separate from its homologoue during meiosis |
| point mutation | a change that occurs within a single gene or other segment of DNA on a chromosome |
| substitution | is when one nucleotide replaces another |
| frameshift mutation | incorrect grouping of the remaining codons (check) |
| insertion mutation | is when one or more nucleotides are added to a gene |
Created by:
deanr2019