Crisscross puzzle: Evolution of NZ flora and fauna

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Word list: Answers here
Beech, Bottleneck, Conifer, Dicotyledon, Endemic, Evolution, Founder effect , Genetic drift, Genetic variation, Homozygosity, Kaka, Kakapo, Kea, Monocotyledon, Morphology, Mutation, Podocarp, Pukeko, Ratite, Recessive, Selection, Species, Subspecies, Takehe,

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Clues:

Across
3. Prevalence of similar alleles in both chromosome sets.
7. Trait that can only show up when homozygous.
10. Flightless parrot descended from the same ancestor as kea and kaka.
11. A large scale but short-term reduction in population size followed by an increase.
12. Trees which produce seeds in a cone.
13. NZ endemic subspecies of
the Purple Swamp Hen
18. Differences amongst individuals in a population due to differences in their alleles.
20. A random change in the genetic makeup of a population.
21. Exclusively native to a place e.g. NZ
22. Flying parrot found in the Southern Alps
23. The group of flowering plants that includes grass, flax and cabbage tree
24. Conifer trees characterized by fleshy seeds which fill the same role as fruit in angiosperms

Down:

1. Sub-population of a species characterized by isolation or different features
2. Dominant forest type of NZ high country.
4. A random change in the genetic code of an organism.
5. A relative of the Pukeko which has evolved into a flightless form.
6. Population that can actually or potentially interbreed to produce fertile offspring.
8. Process by which "fitter" members of a species survive or reproduce more effectively so their traits become normalized in a population.
9. The structure or appearance of an organism.
14. Flying parrot found in NZ forest
15. order of flightless birds, including kiwi
16. Flowering plant with two leaf-seeds.
17. effect A change in the allele frequency because a colonising population is a subset of a larger population.
19. A change in the characteristics of a population over time.