Speciation (AQA A-Level Biology): Flashcards

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Speciation
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Speciation

Process where new species develop from existing ones

Species definition

Group that can interbreed to produce fertile offspring

Allelic frequency

How often a specific allele occurs in the gene pool

Gene pool

All alleles from every gene in all individuals of a population

Genetic drift effect in small populations

More pronounced; each allele has greater impact on gene pool

Allopatric speciation

Speciation via geographical separation by physical barriers

Sympatric speciation

Speciation in same area without physical separation

Temporal isolation

Populations have different breeding seasons

Role of reproductive separation in speciation

Prevents interbreeding, allows genetic divergence

Mule sterility cause

63 chromosomes can't pair correctly during meiosis

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