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The Understanding Of Genetics (biology Only) (GCSE Biology)

The following is a GCSE Biology test covering 'The Understanding Of Genetics (biology Only)' from the broader topic Inheritance, Variation And Evolution. The test is geared towards the AQA exam board style syllabus.
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Cystic fibrosis is caused by a recessive allele. If both parents are carriers (Ff), what is the probability a child will have cystic fibrosis?
Which process produces gametes with half the chromosome number and creates genetic variation by independent assortment and crossing over?
Why is sexual reproduction important for evolution?
Why do polygenic (many-gene) traits tend to show continuous variation in a population?
Polydactyly is caused by a dominant allele. Which offspring genotypes from parents with genotypes Dd and dd will have polydactyly?
Which evolutionary outcome can result from isolation (geographic or reproductive) of subpopulations over many generations?
Two animals from the same species show different fur colour because of differences in their genes. This is an example of what type of variation?
Which of the following best describes genetic drift?
What evidence from fossils most directly supports the theory of evolution by natural selection?
Which process produces new alleles that selection can act upon?
Which outcome is expected when natural selection acts on a population with heritable variation in beak size and the environment favours larger seeds?