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16 Cards in this Set

  • Front
  • Back
Principle of segregation of genes applies to
a. nothing
b. all sexually reproducing organisms
c.all asexually reproducing organisms
d. all forms of life
B
A plant species in which individual plants produce both sperm and eggs is called
a.dioecious
b.pleiotropic
c.polyploid
d.hermaphroditic
e.monoecious
E
Genes located close together on the same chromosomes are referred to as_________genes and generally do not sort indepenently during meiosis.
a. homologous
b. associated
c. linked
d. codependent
C
How many sex chromosomes are in a human gamete?
a.4
b.5
c.2
d.1
D
Which is an example of incomplete dominance?
a. sickle-cell
b. ABO blood groups
c. pink coloration in snapdragons
d. hypercholesterolmia
C
The chromosome theory of inheritance states that
a. humans have 46 chromosomes
b.chromosomes that exhibit mutation are the source of genetic variation
c. the behavior of chromosomes during meiosis and fertilization accounts for patterns of inheritance
d. Mendell was incorrect
C
What is Tay Sach's disease?
a. Recessive disorder causing lipid accumulation in brain cells
b.Cholesterol accumulation in the liver
c.Degeneration of the nervous system
A
Which links RNA nucleotides to form RNA?
a. RNA polymerase
b.tRNA
c.RNA ligase
d. a ribozyme
A
Which of the following is the enzyme that HIV uses to synthesize DNA on a RNA template?
a.ligase
b.RNA polymerase
c.reverse transcriptase
d.terminator enzyme
C
Which one of the following is NOT a function of tRNA?
a.recognizing the appropriate codons in mRNA
b.translating codons into aa
c.transferring nucleotides to rRNA
d.picking up the aa specified by the anticodon
C
Why does a DNA strand only grow in a 5' to 3' direction?
a. because DNA polymerases can only add nucleotides to the 5' end of the growing molecule
b. because mRNA can only read a DNA molecule in 5' to 3' direction.
c. because DNA polymerases can only add nucleotide to the 3' end of the growing molecule
d. None of the above
C
What is the sequence of the flow of info when a gene directs the synthesis of a cellular component?
a. RNA-->DNA-->RNA-->Protein
b. DNA-->RNA-->Protein
c. DNA-->tRNA-->mRNA-->protein
d. protein-->RNA-->DNA
e. none of the above
B
What is a region that does not code for anything?
a. extron
b. intron
c. mutagen
d. purine
B
A change in the relative frequencies of alleles in the gene pool of a population is called
a. genetic drift
b. microevolution
c. mutation
d. diversifying selection
B
Is all variation heritable?
NO
Mate-attracting features such as the bright plumage of a male peacock result from
a. intersexual selection
b. intrasexual selection
A