Bacterial & Phage
Chromosome Variations
Gene Mapping
Genetic Variations
100

Process where bacteria take in DNA from environment

What is Transformation

100

•Loss of chromosome segment

Deletion

100

Exchange of DNA between homologous chromosomes

Crossing over

100


Gene masking another

Epistasis

200

Virus transfers DNA between bacteria

Transduction

200

Extra chromosome condition

Trisomy

200

New allele combinations (different from parents)

Recombinants

200

One gene many traits

Pleiotropy  

300

Cycle where virus destroys host

lytic cycle

300

Failure to separate chromosomes

Nondisjuction

300

% hybrids formula measure

Recombination frequency

300

•Many genes one trait

Polygenic

400

Dormant viral DNA in host

Prophage

400

Segment reversed

Inversion

400

Max RF value

50%

400

9:3:4 ratio type

Recessive Epistasis

500

Direct DNA transfer via pilus

conjugation

500

Exchange between chromosomes

Translocation

500

•Genes close = ___ RF

low

500

•Bell curve traits

Polygentic traits

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