18. In a research article about alkaptonuria published in 1902, Garrod documente

Question

18. In a research article about alkaptonuria published in 1902, Garrod documented this disease to be caused by a defective enzyme in the human body. He suggested that humans inherit two alleles for this particular enzyme and that both parents must contribute a faulty version for the offspring disorder, Given our knowledge today, we could affirm that: a, the allele for alkaptonuria is a recessive allele b. the allele for alkaptonuria is a dominant allele c. the faulty enzyme allele is the result of a mutation d. alkaptonuria is a rare disorder because one individual can have more than two alleles for this gene. 19. A mutation occurs to a DNA molecule in an organism's skin cell before the organism reproduces. When the organism reproduces, how many of its children will have the mutation? a. All of the organism's children will have the mutation b. Some of the organism's children will have the mutation. c. None of the organism's children will have the mutation. d. I t will depend on how much time passes between when the mutation occurs and when the organism has children. 20. Could individuals of a species look different today than individuals of the same species di many generations ago? Why or why not? a. Yes, all individuals can change their traits during their lifetimes and pass those changes on to their offspring. b. Yes, some individuals with certain traits are more likely to survive and pass those traits on to their offspring. c. No, species do not change even after many generations, so individuals of the same species would not look different d. No, traits and their frequency of occurrence remain consistent within a specie 21. Which of the following correctly describes what happens when a population of bacteria becomes resistant to an antibiotic? Note: a bacterium is one individual in a group of bacteria. During treatment with an antibiotic, each individual bacterium tries to become resistant to the antibiotic. Only some are able to willingly become resistant, and these individuals survive to pass this trait to their offspring During treatment with an antibiotic, all of the bacteria gradually become more resistant to the antibiotic the more they are exposed to it. They all survive and pass this trait to their offspring. a. b. C. During treatment with an antibiotic, a population of bacteria usually dies. Sometimes by chance, all members of the population become resistant at once, survive, and pass their resistance to their offspring. d. During treatment with an antibiotic, only those individual bacteria that already have a trait that helps them survive the effects of the antibiotic will live. Their offspring in the next generation will also have this trait

Explanation / Answer

20.b

21.d

22.a

23.b

24.c

25.d

26.a

27.a

28.c

29.c

30.false

31.d

32.true

33.false(recent studies says alone temparature cant cause malaria)

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