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Biology Past Questions

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11

Heterozygous tall plants were crossed with pure-breeding dwarf plants of the same species. What were the approximate percentages of the offspring?

  • A. 100% tall 0% dwarf
  • B. 75% tall 25% dwarf
  • C. 50% tall 50% dwarf
  • D. 25% tall 75% dwarf
View Answer & Discuss (13) WAEC 2004
12

Evidence for evolution include the following except?

  • A. fossil records
  • B. Comparative anatomy
  • C. mutation of genes
  • D. geographical distribution of genes
View Answer & Discuss (4) WAEC 2009
13

A pair of genes that control a trait is referred to as?

  • A. an allele
  • B. recessive
  • C. dominant
  • D. a hybrid
View Answer & Discuss (2) JAMB 2010
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
14

If both parents are heterozygous for a trait, the probability that an offspring will be recessive for that trait is?

  • A. \(\frac{1}{2}\)
  • B. \(\frac{3}{4}\)
  • C. \(\frac{1}{4}\)
  • D. 1
View Answer & Discuss (9) JAMB 2010
15

Which of these statements is NOT an idea contained in Lamarck’s theory of evolution.?

  • A. acquired characters are inheritable
  • B. changes in the environment result in corresponding changes in the species
  • C. environmental changes cause the organism to acquire new structures as an adjustment to a new prevailing environment
  • D. organisms develop specialized characteristic by use and disuse of organs
  • E. organisms tend to an increase in number at an exponential rate
View Answer & Discuss (2) NECO 2000
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208