Alberta Diploma Exams · Biology 30

Genetics, molecular biology and populations

22 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 22 questions

  1. How many chromosomes are in a normal human somatic cell?
  2. What happens during synapsis and crossing over in prophase I of meiosis?
  3. What is the difference between anaphase I and anaphase II of meiosis?
  4. Down syndrome is most commonly caused by
  5. Two heterozygous parents have offspring. What is the expected phenotype ratio when A is completely dominant?
  6. Two parents are both with independent assortment. What is the probability of an offspring?
  7. A red snapdragon is crossed with a white snapdragon and all offspring are pink. This is an example of
  8. A person with blood type AB has the genotype . This illustrates
  9. A mother with type A blood (genotype ) and a father with type B blood (genotype ) have a child. What is the probability that the child has type O blood?
  10. A woman is a carrier of red-green colour blindness (X-linked recessive) and her partner has normal vision. What fraction of their sons is expected to be colour blind?
  11. Two unaffected parents have an affected daughter. Which inheritance pattern is most likely?
  12. Why is DNA replication described as semi-conservative?
  13. Which statement describes translation?
  14. A DNA triplet on the template strand is TAC. What is the complementary mRNA codon?
  15. A DNA template strand reads 3'-TACGGA-5'. What is the mRNA sequence produced?
  16. In genetic engineering, which enzymes cut DNA at specific base sequences?
  17. What is the purpose of the polymerase chain reaction (PCR)?
  18. Which of these is a density-dependent limiting factor on a population?
  19. In a symbiotic relationship where one organism benefits and the other is neither helped nor harmed, the relationship is
  20. A population of 2000 has 160 births, 100 deaths, 40 immigrants and 20 emigrants in a year. What is the population growth rate?
  21. Which organisms are typically the pioneer species during primary succession on bare rock?
  22. What is the carrying capacity of an environment?

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