What is the difference between a genotype and phenotype?
Genotype - genetic code through alleles that code for trait. Phenotype - describing a trait we can sometimes see physically.
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15
There is a population of beetles found in a specific deciduous forest. A few of these beetles end up in a different deciduous forest and are able to reproduce. This causes the frequencies of alleles to change. What effect is this?
Genetic Drift - Founder Effect
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15
Explain Gametic Isolation.
The egg and sperm never meet, as the sperm may not be viable in the reproductive tract or possess the traits required for fertilization.
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15
All species, living or not, were derived from a common ancestor linked by a single tree of life is known as whar?
Descent with modification/common descent. Concept where all species are thought to have been derived from one ancestor/origin
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15
Humans breed cats to produce only orange cats, this is an example of?
Artificial selection
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15
Two species of grass plants flower at different times of the year, but they live in the same habitat. Which isolation mechanism is this?
Temporal isolation - pre-zygotic
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20
What is Darwin's theory of evolution. Explain two points.
Variations exist in a pop., Cannot obtain adaptation, survival of the fittest, favorable traits survive + reproduce, time for change, descent with modification
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25
What is the similarities between allopatric and sympatric speciation. What is the difference?
Both involve the creation of new species. Allopatric - geological barriers, Sympatric - issues with cell division or mutations.
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15
Explain homozygous and heterozygous.
Homozygous - genotype with 2 same alleles. Heterozygous - genotype with 2 different alleles.
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banana
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shark
Other team loses 20 points!
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shark
Other team loses 25 points!
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banana
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20
How is convergent evolution different from coevolution?
Convergent evolution is when two different species in same environment develop similar traits, coevolution is when two different species impact eachother evolut
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20
The crossing of two species produces a fertile hybrid offspring. This hybrid goes on to produce an offspring that is weak and infertile. This is which isolation mechanism?
Hybrid breakdown - post-zygotic.
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monster
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magnet
Take 10 points!
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fairy
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15
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25
lifesaver
Give 15 points!
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monster
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rocket
Go to first place!
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rocket
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baam
Lose 15 points!
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25
When individuals with the extreme allele expressions are favored in an environment, what type of natural selection is this? Explain.