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5 Written questions

5 Matching questions

  1. What are some risk factors for drug use?
  2. What is the difference between an intron and an exon?
  3. What is the difference between a dominant and a recessive allele? How can you tell the difference between them when they are written down?
  4. What is descent with modification?
  5. What is crossing over? When does it occur? Why is it important?
  1. a Crossing over is when homologous chromosomes exchange genetic material by crossing 1 leg over the other breaking off and reattaching to the opposite chromosome.
    Occurs during prophase 1 of meiosis 1.
    Increases genetic variation within a species.
  2. b 1) friends who use
    2) low self esteem
    3) lack of involvement in activities
    4) availability of drugs
  3. c Several species of a animal evolving from a common ancestor and through the generations as they move to different environments they all evolve with their environment becoming new species
  4. d Introns are non-coding segments of mRNA which are cut out of the mRNA after transcription
    Exons are coding segments of mRNA which are spliced together after the introns have been removed.
  5. e A dominant allele is always expressed if it is present while the recessive allele is submissive to the dominant allele and isn't expressed unless paired with another recessive.
    D- dominant
    d- recessive

5 Multiple choice questions

  1. 47 chromosomes
    Down's is caused by trisomy 21
    Caused by non disjunction of chromosomes during meiosis
  2. Fossil record- shows a pattern of gradual change from past to present

    Biogeography- shows that similar environmental conditions contribute to similar development

    Developmental biology- shows similarity in embryonic development in organisms deriving from a common ancestor

    Anatomy- shows similarity of structures n organisms that are related or descended from a common ancestor

    Biochemistry- similarity in amino acid sequences of proteins or DNA give evidence of common ancestry
  3. Crossing over- homologous chromosomes exchange genetic material during the 1st phase of meiosis
    Law of segregation- the random chance that the gamete will receive either allele
    Law of independent assortment- during meiosis each allele for each gene separate independently from one another
  4. The process of change by which new species develop from preexisting species over time
    The idea of natural election if why evolution happens
    Individuals with traits advantageous to survival will produce more offspring
    Over time the number of individuals possessing those traits will increase in a population
  5. Is a vaginal infection caused by a fungal organism causing discharge, vaginal itching, painful urination and can usually be cured by pre scripted medicine.

5 True/False questions

  1. Which drug is hardest to quit after one use?Tobacco


  2. What are transcription facts?They regulatory proteins and activate or repress transcription of specific genes


  3. What makes up a nucleotide in DNA? RNA?In DNA: Adenine with Thymine, Guanine with Cytosine
    In RNA: Adenine with Uracil, Guanine with Cytosine


  4. What is the difference between microevolution and macroevolution?microevolution- looks at the process by which inherited traits change over time in a population
    5 major processes that affect the kinds of genes in a population from generation to generation are migration, mate choice, natural selection , mutation, and genetic drift

    macroevolution- looks at the patterns in which new species evolve by studying the direction, diversity, or speed of change. Patterns are convergent evolution, co-evolution, adaptive radiation, extinction, gradualism and punctuated equilibrium.


  5. Why is gene expression controlled?1) They have very contrasting traits
    2) Can both self-pollinate and cross pollinate
    3) Easy to grow


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