Chapter 12.1 Vocabulary
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Sex Chromosome | contains genes that determine the sex of an individual
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| Autosome | the remaining chromosomes that are not directly involved in determining the sex of an individual
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| Sex-Linked Trait | refers to a trait that is coded for by an allele on a sex chromosome
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| Linked Gene | pairs of genes that tend to be inherited together
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| Chromosome Map | a diagram that shows the linear order of genes on a chromosome
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| Map Unit | a frequency of crossing-over of 1 percent
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| Germ-Cell Mutation | a mutation, a change in the nucleotide-base sequence of a gene or DNA model, that occurs in an organism's gametes
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| Somatic-Cell Mutation | a mutation that occurs in an organism's body cells and can therefore affect the organism
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| Lethal Mutation | mutations that can cause death, often before birth
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| Deletion | a loss of a piece of a chromosome due to breakage
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| Inversion | when a chromosomal segment breaks off, slips around backward, and reattaches
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| Translocation | when a piece of one chromosome breaks off and reattaches to a nonhomologous chromosome
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| Nondisjunction | a chromosome fails to separate from its homologue during meiosis
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| Point Mutation | a change that occurs within a single gene or other segment of DNA on a chromosome
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| Substitution | when one nucleotide replaces another; the amino acid can be changed
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| Frameshift Mutation | can result as a loss of a nucleotide; when all amino acids downstream from the lost nucleotide change
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| Insertion Mutation | when one or more nucleotides are added to a gene, which can also result in a frameshift mutation
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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