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Biology 2010 WAEC Past Questions

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51
In artificial selection, individuals without desirable traits may be prevented from mating by
  • A. outbreeding
  • B. sterilization
  • C. inbreeding
  • D. genetic engineering
View Answer & Discuss WAEC 2010
52
In a family of eight (8) all the children are girls Which of the following reasons correctly explains this?
  • A. The woman cannot produce male children
  • B. The man has a low sperm count
  • C. The Y component of the man’s sex chromosome was always involved
  • D. The X component of the man’s sex chromosome was always involved.
View Answer & Discuss (2) WAEC 2010
53
Which of the following statements is correct about the structure of a chromosome? A chromosome consists of
  • A. two chromatids joined at the centromere
  • B. Two chromatids joined at the spindle
  • C. Two chromatin threads joined at the centrioles
  • D. thread-like structures not joined together
View Answer & Discuss WAEC 2010
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54
Mr. Andrew, his wife and child belong to blood groups A, B and O respectively. The genotypes of both parents are
  • A. IA IO and IB IB
  • B. IA IA and IB IB
  • C. IA IB and IA IO
  • D. IA IO and IB IO.
View Answer & Discuss WAEC 2010
55
What would be the phenotypic ratio of the offspring of a cross between a heterozygous dominant parent and a double recessive parent?
  • A. 1 : 2: 1
  • B. 1 : 1
  • C. 3 :1
  • D. 2 : 1
View Answer & Discuss (5) WAEC 2010
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