The PCR involves two oligonucleotide primers, 17–30 nucleotides in length, which flank the DNA sequence that is to be amplified.

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#Unit 8. Inheritance Biology

If a single crossover takes place in the inverted region an unusual structure results

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#Id: 2133

#Unit 8. Inheritance Biology

Dicentric bridge, Structure produced when the two centromeres of a dicentric chromatid are pulled toward opposite poles

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#Id: 2134

#Unit 8. Inheritance Biology

In paracentric inversion form,

a. Acentric chromatid- Chromatid that lacks a centromere

b. Dicentric chromatid- Chromatid that has two centromere

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#Unit 8. Inheritance Biology

Recombination is also reduced within a pericentric inversion. No dicentric bridges or acentric fragments are produced.

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#Id: 2136

#Unit 8. Inheritance Biology

Recombinant chromosomes have too many copies of some genes and no copies of others, so gametes that receive the recombinant chromosomes cannot produce viable progeny.

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#Id: 2137

#Unit 8. Inheritance Biology

This suppression of recombination allows alleles adapted to a specific environment to remain together, unshuffled by recombination