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9 Cards in this Set
- Front
- Back
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What is a mutation? |
A change in nucleotide-base sequence of a gene or DNA molecule. |
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What is a Germ - Cell mutation? |
Mutation in organism's gametes. (sex cells) |
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What is a Somatic cell mutation? |
Mutation in body cell & can therefore affect the organism. (Not inherited) |
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What is a lethal mutation? |
Mutation that causes death, usually before birth. |
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Are some mutations good? |
Yes, some can be beneficial to the individual which allows for better chance of survival. |
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What is a deletion mutation? |
A loss of a piece of chromosome due to breakage. |
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What is an inversion mutation? |
A chromosomal segment breaks off, flips around backwards & reattaches. |
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What is a translocation mutation? |
A piece of one chromosome breaks off & reattaches to a non homologous chromosome. |
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What is a nondisjunction mutation? |
A chromosome fails to separate from its homologous during meiosis, gamete receives an extra copy of a chromosome & the other has no copy. |
