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17 Cards in this Set
- Front
- Back
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Natural Selection |
Individuals most adapted to the enviro will survive and reproduce. |
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Founder Effect |
Is when a new population is established by a small number of individuals from ancestral population. |
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Genetic Drift |
Chance change in allele frequency of a population. |
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Complete Dominance |
The dominant allele will always be expressed |
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Incomplete Dominance |
A form of inheritance in which one allele for a specific trait is not completely dominant over the other allele. This results in an intermediate phenotype. Neither fully expresses. |
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Co-dominance |
When both alleles will always be expressed. |
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Multiple Alleles |
Multiple alleles occur with genes that have more than two different alleles, though an individual will only have two of the alleles in its genotype. |
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Give a common example of a situation involving multiple alleles |
Inheritance of human blood groups shows multiple alleles. |
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Genetic Change |
The change in frequency of alleles in the gene pool of a population. |
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Meiosis |
Meiosis is the process of cell division that occurs in the sex organs (ovaries and testes), and produces the sex cells or gametes (ova and sperm). |
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Independent Assortment |
Independent Assortment occurs when the homologous pairs line up in a random order during meiosis. |
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Segregation |
Segregation refers to the independent separation of alleles on different chromosomes. |
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Crossing Over/Recombination |
Alleles on the same chromosomes are linked, since they are inherited together. However, linked genes can be separated by crossing over. |
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What is a result of crossing over? |
Linked alleles are separated, so different combinations of alleles from those of the parents can result. |
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What are the parental types? |
The alleles on the two chromosomes, which remain linked. |
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What are the recombinants? |
The alleles on the other two chromosomes, which have crossed over. |
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Fertilisation |
Fertilisation is the fusion of a sperm and an ovum, bringing together the maternal and paternal chromosomes and so restoring the diploid state (2n) in the zygote. |
