The noble gases are left out of the trends in atomic radii because there is great debate over the experimental values of their atomic radii.

The SI units for measuring atomic radii are the nanometer (nm) and the picometer (pm). 1 nm = 1 X 109 m; 1 pm = 1 X 10-12 m.

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#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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#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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#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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#Unit 8. Inheritance Biology

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

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#Unit 8. Inheritance Biology

Suppression of recombination