1) The number of chromosomes in a human body cell a) 22 b) 23 c) 46 d) 48 2) In DNA, the base 'A' pairs with base a) C b) G c) T 3) Different versions of the same genes a) Allele b) Chromosome c) Ribosome d) Recessive 4) A person with alleles BB is said to be a) Homozygous dominant b) Heterozygous c) Homozygous recessive 5) A human female has chromosomes a) XX b) XY c) YY d) XYZ

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