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 All the DNA of an individual genome 1 of 18 All the proteins produced from an organism's genome proteome 2 of 18 Changes in DNA structure mutation 3 of 18 If a feature is advantageous, that allele will be __________ for selected 4 of 18 Relative occurence of a particular allele in a population frequency 5 of 18 Pair of chromosomes that carry the same gene loci but probably different alleles. One is maternal, the other is paternal homologous 6 of 18 Group of closely related organisms that can all potentially interbreed to produce fertile offspring species 7 of 18 Caused by natural selection acting on a species over several generations evolution 8 of 18 Type of speciation where populations are separated by geographical isolation allopatric 9 of 18 Type of speciation which occurs without a geographical barrier sympatric 10 of 18 Reproductive barrier that prevents fertilisation prezygotic 11 of 18 Reprodductive barrier in which the zygote fails to develop or breed postzygotic 12 of 18 Various different factors cause two populations of a species to become __________ from each other, and thefore unable to breed isolation 13 of 18 Two populations are _________ isolated if their mating or flowering periods become out of sync temporally 14 of 18 If the reproductive organs of one gender are very specific to a particular group of the other gender, populations may become _____________ isolated mechanically 15 of 18 _______________ isolation occurs when the sperm and egg (or equivalent) cannot join in fertilisation gametic 16 of 18 Ability to thrive and grow viability 17 of 18 When the offspring of 2 different species is unable to breed (2 words) hybrid infertility 18 of 18
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