Speciation and Evolution 3.0 / 5 based on 1 rating ? BiologyDNA, genetics and evolutionA2/A-levelEdexcel Created by: Lyndsay BakerCreated on: 24-10-12 13:26 10436271589 Across 1. When the offspring of 2 different species is unable to breed (2 words) (6, 11) 5. Caused by natural selection acting on a species over several generations (9) 6. Type of speciation where populations are separated by geographical isolation (10) 7. Ability to thrive and grow (9) 8. Various different factors cause two populations of a species to become __________ from each other, and thefore unable to breed (9) 9. If the reproductive organs of one gender are very specific to a particular group of the other gender, populations may become _____________ isolated (12) Down 2. _______________ isolation occurs when the sperm and egg (or equivalent) cannot join in fertilisation (7) 3. Reprodductive barrier in which the zygote fails to develop or breed (11) 4. If a feature is advantageous, that allele will be __________ for (8) 10. Relative occurence of a particular allele in a population (9)
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