A. A normal male B. A normal female C. A female with Down syndrome D. A male with Down syndrome (Total 1 mark) 5. The pedigree chart below shows the blood types of three members of a family. Which could be the blood types of individuals 1 and 2? Individual 1 Individual 2 A. A AB B. AB B C. O B D. B A (Total 1 mark) 6. Boys can inherit the recessive allele (c) that causes red-green colour blindness from their mother, not from their father. The allele for normal red and green vision is Which of the C. following genotypes are possible in men? A. only c B. or only C c C. or only CC cc D. or only CC, Cc cc (Total 1 mark) 7. What is chorionic villus sampling? A. Sampling cells from the placenta B. Sampling cells from the fetal digestive system
A. A normal male B. A normal female C. A female with Down syndrome D. A male with Down syndrome (Total 1 mark) 5. The pedigree chart below shows the blood types of three members of a family. Which could be the blood types of individuals 1 and 2? Individual 1 Individual 2 A. A AB B. AB B C. O B D. B A (Total 1 mark) 6. Boys can inherit the recessive allele (c) that causes red-green colour blindness from their mother, not from their father. The allele for normal red and green vision is C. Which of the following genotypes are possible in men? A. c only B. C or c only C. CC or cc only D. CC, Cc or cc only (Total 1 mark) 7. What is chorionic villus sampling? A. Sampling cells from the placenta B. Sampling cells from the fetal digestive system
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