Neatherd High School: Today's Mock GCSE question is from the Biology paper! Many genes have different forms called alleles. 9 (b) (i) A person has polydactyly (extra fingers or toes). Polydactyly is caused by a dominant allele. What is the smallest number of copies of the dominant allele for polydactyly that could be found in a body cell of this person? (1 mark) (b) (ii) Another person has cystic fibrosis. Cystic fibrosis (CF) is caused by a recessive allele. How many copies of the recessive CF allele are there in a body cell of this person? (1 mark)

Wednesday, 2 December 2015

Today's Mock GCSE question is from the Biology paper! Many genes have different forms called alleles. 9 (b) (i) A person has polydactyly (extra fingers or toes). Polydactyly is caused by a dominant allele. What is the smallest number of copies of the dominant allele for polydactyly that could be found in a body cell of this person? (1 mark) (b) (ii) Another person has cystic fibrosis. Cystic fibrosis (CF) is caused by a recessive allele. How many copies of the recessive CF allele are there in a body cell of this person? (1 mark)

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