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Biology AQA Genetics

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Quiz by MedSoc
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Last updated: September 26, 2016
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First submittedSeptember 26, 2016
Times taken80
Average score43.8%
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The genetic constitutionof an organism.
genotype
Observable or biochemical characteristics of an organism.
phenotype
A length of DNA that codses for a particular polypeptide.
gene
The position of (answer to above question) on a particular DNA molecule.
locus
In diploid organisms the chromosomes occur in pairs called.
Homologous pairs
When two alleles both contribute to the phenotype.
codominance
The study of the inheritance of a single gene.
monohybrid inheritance
Any gene that is carried on either the X or Y chromosome is said to be.
Sex linked
Hint
Answer
A chromosome that is neither X nor Y.
Autosome
When the allele of one gene effects or masks the expression of another gene.
Epistasis
All the alleles of all the genes in a population at a given time.
Gene pool
The number of times an allele occurs within the (answer to the above question).
Allele frequency
A sudden change in the amount or arrangement of the genetic material in a cell.
Mutation
Type of selection that preserves the average phentoype of a population by favouring average indivinduals.
Stabilising selection
Selection that favours individuals with extreme phenotypes, rather than those with the mean.
Disruptive selection
The evolution of a new species.
Speciation
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