IB Questionbank Biology11.The blood groups of a mother and four children are indicated on the pedigree chart below.What are the possible blood groups of the father?A.Group A onlyB.Group A or B onlyC.Group AB onlyD.Group A, B or AB only(Total 1 mark) 2.If a man has blood group O and a woman has blood group AB, what is the probability that their child will be blood group O?A.0%B.25%C.50%D.100%(Total 1 mark) 3.A woman who is a carrier for hemophilia and a man who does not have hemophilia have a child.What is the probability that the child will have hemophilia?If it is a girlIf it is a boyA.0%50%B.0%0%C.50%50%D.50%0%(Total 1 mark) 4.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 onlyB.C or c onlyC.CC or cc onlyD.CC, Cc or cc only(Total 1 mark) 5.Red-green colour blindness is a sex-linked condition. Which of the following always shows normal vision?A.A homozygous maleB.A homozygous femaleC.A heterozygous maleD.A heterozygous female(Total 1 mark)6.What type of inheritance is shown in this pedigree chart?A.X-linked dominantB.Y-linked dominantC.X-linked recessiveD.Y-linked recessive(Total 1 mark)7.Which of the following would be possible only if the ACHOO syndrome is inherited as autosomal recessive?[Source: Autosomal dominant pedigree chart. In Autosomal Dominance the chance of receiving and expressing a particular gene is 50% regardless of the sex of parent or child. Jerome Walker. 22 July 2006.]A.Two unaffected parents have a child with the condition.B.At least one parent has to be affected to produce children that have the condition.C.An affected and an unaffected parent have an affected child.D.Two unaffected parents have no affected children.(Total 1 mark) 8.What evidence is given in the pedigree chart below to establish that the condition is caused by a dominant allele?A.Two unaffected parents have unaffected children.B.Two affected parents have affected children.C.An affected parent and an unaffected parent have affected children.D.Two affected parents have an unaffected child.(Total 1 mark)9.A parent organism of unknown genotype is mated in a test cross. Half of the offspring have the same phenotype as the parent. What can be concluded from this result?A.The parent of unknown genotype is heterozygous.B.The parent of unknown genotype is homozygous dominant.C.The parent of unknown genotype is homozygous recessive.D.The parent of known genotype is heterozygous.(Total 1 mark) 10.The ACHOO syndrome is an inherited condition that leads to sneezing in response to bright light and is hypothesized to be inherited in an autosomal (not sex-linked) dominant fashion. The following is a pedigree chart that shows three generations from one family.[Source: Autosomal dominant pedigree chart. In Autosomal Dominance the chance of receiving and expressing a particular gene is 50% regardless of the sex of parent or child. Jerome Walker. 22 July 2006.]If the ACHOO syndrome is inherited as an autosomal dominant condition, what is the probability that a heterozygous father and an unaffected mother produce an unaffected child?A.0%B.25%C.50%D.100%(Total 1 mark)11.Rhesus factor is an antigen present on the surface of red blood cells of Rhesus positive individuals.Rhesus positive (Rh+ ) is dominant to Rhesus negative (Rh ). A mother with Rhesus negative blood gives birth to a baby with Rhesus positive blood and there are concerns that subsequent pregnancies will trigger an immune response.What are the genotypes of the mother and her first baby?Genotype of motherGenotype of first babyA.Rh RhRh RhB.Rh RhRh+ RhC.Rh RhRh+ Rh+D.Rh+ RhRh+ Rh+(Total 1 mark) 12.The ACHOO syndrome is an inherited condition that leads to sneezing in response to bright light and is hypothesized to be inherited in an autosomal (not sex-linked) dominant fashion. The following is a pedigree chart that shows three generations from one family.[Source: Autosomal dominant pedigree chart. In Autosomal Dominance the chance of receiving and expressing a particular gene is 50% regardless of the sex of parent or child. Jerome Walker. 22 July 2006.]What evidence from the pedigree chart confirms that the ACHOO syndrome is not X-linked dominant?A.Four females in the pedigree chart are affected and X-linked conditions do not affect females.B.There is an affected male in generation II.C.There is an affected female in generation II.D.If the condition is X-linked dominant, the affected mother in generation II could not produce an unaffected son.(Total 1 mark)