GENETICS NORCROSS CHAPTER 1 WITH
QUESTIONS AND WELL VERIFIED ANSWERS
[ALREADY GRADED A+} REAL EXAM!!
9. Which of the following would serve the LEAST well as a model for
understanding basic mechanisms of inheritance?
A) fruit flies
B) humans
C) yeast
D) mice
E) zebrafish - ANS✔✔---B) humans
10. Which of the following statements is TRUE?
A) Each subdiscipline of genetics is very specific as to what is explored and
does not overlap with the other subdisciplines.
B) All phenotypes or traits are always determined by multiple genes.
,C) Albinism arises from the overexpression of the gene that controls the
synthesis and storage of melanin.
D) Humans make excellent model organisms because they have a variety of
well-defined traits.
E) None of the statements provided are true. - ANS✔✔---E) None of the
statements provided are true.
11. Which of the following statements is CORRECT?
A) All genomes are encoded in DNA only.
B) All genomes are encoded in nucleic acids.
C) All genomes are encoded in proteins only.
D) The genetic instructions are decoded completely differently in each organism.
E) Molecular studies suggest life evolved from multiple primordial ancestors. -
ANS✔✔---B) All genomes are encoded in nucleic acids.
12. Which of the following traits would make a species useful as a model genetic
organism? (Select all that apply.)
A) large number of progeny
B) long generation time
C) small size
D) ability to be studied in a laboratory
E) ability to be propagated inexpensively - ANS✔✔---A) large number of
progeny
C) small size
D) ability to be studied in a laboratory
, E) ability to be propagated inexpensively
13. Which one of the following topics belongs to a different subdiscipline of
genetics when compared with the rest?
A) mechanism of gene regulation
B) allele frequencies of a certain gene in different environments
C) transcription
D) chemical alternation of chromosomes
E) mechanism of DNA replication - ANS✔✔---B) allele frequencies of a
certain gene in different environments1. Albinism is rare in most human
populations, occurring at a frequency of about 1 in 20,000 people. However, the
trait occurs at a frequency of 1 in 200 in certain Hopi villages of Black Mesa in
Arizona. Explain in terms of natural selection why albinism is so rare in most
human populations. - ANS✔✔---In the Hopi tribe the men who had albinism
were excused from field labor due to their susceptibility to sunburns and skin
cancer which allowed them to remain with the females tending to chores and led
to them having an advantage in mating. The ones with Albinism are also
considered special and important.
3. Which one of the following pairings between the subdiscipline of genetics and
the phenomenon is INCORRECT?
A) evolution—population genetics
B) gene regulation—molecular genetics
C) allelic frequency alteration—population genetics
D) arrangement of genes on chromosome—transmission genetics
QUESTIONS AND WELL VERIFIED ANSWERS
[ALREADY GRADED A+} REAL EXAM!!
9. Which of the following would serve the LEAST well as a model for
understanding basic mechanisms of inheritance?
A) fruit flies
B) humans
C) yeast
D) mice
E) zebrafish - ANS✔✔---B) humans
10. Which of the following statements is TRUE?
A) Each subdiscipline of genetics is very specific as to what is explored and
does not overlap with the other subdisciplines.
B) All phenotypes or traits are always determined by multiple genes.
,C) Albinism arises from the overexpression of the gene that controls the
synthesis and storage of melanin.
D) Humans make excellent model organisms because they have a variety of
well-defined traits.
E) None of the statements provided are true. - ANS✔✔---E) None of the
statements provided are true.
11. Which of the following statements is CORRECT?
A) All genomes are encoded in DNA only.
B) All genomes are encoded in nucleic acids.
C) All genomes are encoded in proteins only.
D) The genetic instructions are decoded completely differently in each organism.
E) Molecular studies suggest life evolved from multiple primordial ancestors. -
ANS✔✔---B) All genomes are encoded in nucleic acids.
12. Which of the following traits would make a species useful as a model genetic
organism? (Select all that apply.)
A) large number of progeny
B) long generation time
C) small size
D) ability to be studied in a laboratory
E) ability to be propagated inexpensively - ANS✔✔---A) large number of
progeny
C) small size
D) ability to be studied in a laboratory
, E) ability to be propagated inexpensively
13. Which one of the following topics belongs to a different subdiscipline of
genetics when compared with the rest?
A) mechanism of gene regulation
B) allele frequencies of a certain gene in different environments
C) transcription
D) chemical alternation of chromosomes
E) mechanism of DNA replication - ANS✔✔---B) allele frequencies of a
certain gene in different environments1. Albinism is rare in most human
populations, occurring at a frequency of about 1 in 20,000 people. However, the
trait occurs at a frequency of 1 in 200 in certain Hopi villages of Black Mesa in
Arizona. Explain in terms of natural selection why albinism is so rare in most
human populations. - ANS✔✔---In the Hopi tribe the men who had albinism
were excused from field labor due to their susceptibility to sunburns and skin
cancer which allowed them to remain with the females tending to chores and led
to them having an advantage in mating. The ones with Albinism are also
considered special and important.
3. Which one of the following pairings between the subdiscipline of genetics and
the phenomenon is INCORRECT?
A) evolution—population genetics
B) gene regulation—molecular genetics
C) allelic frequency alteration—population genetics
D) arrangement of genes on chromosome—transmission genetics
