Biology A-Level
trisomy
What trisomy means in Biology A-Level, as defined for AQA.
Definition of trisomy
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Reference: AQA
A zygote with forty-seven chromosomes in humans, formed when a gamete with n plus one chromosomes is fertilised by a normal gamete, as in Down's syndrome.
Topics that use trisomy
Related terms
- alleles
- chemical mutagens
- chromosome content diagrams
- crossing over
- degenerate code
- frameshift
- genetic variation
- independent segregation
Using trisomy in the exam
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