Worksheetschap 1 & 2 - genetics
Total questions: 24
Worksheet time: 12mins
which of the following is not a constituent of a cell's proteome?
an enzyme
mRNA
a cytoskeletal protein
a transport protein in the plasma membrane
a gene is a segment of DNA that contains the information to produce a functional product. the functional product of most genes is
DNA
mRNA
a polypeptide
none of the above
the function of the genetic code is to
promote transcription
specify the amino acids within a polypeptide
alter the sequence of DNA
none of the above
the direct result of the process of transcription is the synthesis of
DNA
RNA
a polypeptide
all of the above
at which of the following levels can gene expression be observed
molecular and cellular levels
organism level
population level
all of the above
variation in the traits of organisms may be attributable to
gene mutations
alterations in chromosome structures
variation in chromosome number
all of the above
a human skin cell has 46 chromosomes. a human sperm cell has
23
46
92
none of the above
evolutionary change caused by natural selection results in species with
greater complexity
less complexity
greater reproductive success in their environment
the ability to survive longer
which of the following is not a model organism
mus musculus (lab mouse)
escherichia coli (a bacterium)
saccharomyces cerevisiae (a yeast)
sciurus carolinensis (gray squirrel)
a person studying the rate of transcription of a particular gene is working in the field of
molecular genetics
transmission genetics
population genetics
none of the above
the scientific method involves which of the following?
the collection of observations and the formulation of a hypothesis
experimentation
data analysis and interpretation
all of the above
experimental advantages of using pea plants include which of the following
they came in several different varieties
they were capable of self-fertilization
they were easy to cross
all of the above
with regards to mendel's experiments, the term cross refers to an experiment in which
the gametes come from different individuals
the gametes come from a single flower of the same individual
the gametes come from different flowers of the same individual
both a & c are true
to avoid self-fertilization in his pea plants, mendel had to
spray the plants with a chemical that damaged the pollen
remove the anthers from immature flowers
grow the plants in a greenhouse that did not contain pollinators
all of the above
a pea plant is Tt, which of the following statements is correct
its genotype is Tt, and its phenotype is dwarf
its phenotype is Tt, and its genotype is dwarf
its genotype is Tt, and its phenotype is tall
its phenotype is Tt, and its genotype is tall
a Tt pea plant is crossed to a tt plant. what is the expected ratio of phenotypes for offspring from this cross
3 tall : 1 dwarf
1 tall : 1 dwarf
1 tall : 3 dwarf
2 tall : 1 dwarf
a pea plant has the genotype rrYy. how many different types of gametes can it make and in what proportions
1 rr : 1 Yy
1 rY : 1 ry
3 rY : 1 ry
1 RY : 1 rY : 1 Ry : 1 ry
a cross is made between a pea plant that is RrYy and one that is rrYy. what is the predicted outcome of the seed phenotypes
9 round, yellow : 3 round, green : 3 wrinkled, yellow : 1 wrinkled, green
3 round, yellow : 3 round, green : 1 wrinkled, yellow : 1 wrinkled, green
3 round, yellow : 1 round, green : 3 wrinkled, yellow : 1 wrinkled, green
1 round, yellow : 1 round, green : 1 wrinkled, yellow : 1 wrinkled, green
in a population of wild squirrels, most of them have gray fur, but an occasional squirrel is completely white. if we let P and p represent dominant and recessive alleles, respectively, of a gene that encodes an enzyme necessary for pigment formation, which of the following statements do you think is most likely correct
the white squirrels are pp, and the p allele is a loss-of-function allele
the gray squirrels are pp, and the p allele is a loss-of-function allele
the white squirrels are PP, and the P allele is a loss-of-function allele
the gray squirrels are PP, and the P allele is a loss-of-function allele
which of the following would not be observed in a pedigree if a genetic disorder was inherited in a recessive manner
two unaffected parents have an affected offspring
two affected parents have an unaffected offspring
one affected and one unaffected parent have an unaffected offspring
all of the following are possible for a recessive disorder
for the pedigree shown here, which pattern(s) of inheritance is/are possible? affected individuals are shown with a filled symbol
recessive
dominant
both recessive and dominant
neither recessive or dominant
a cross is made between AA Bb Cc Dd and Aa Bb cc dd individuals. rather than making a very large punnett square, which statistical operation could you use to solve this problem and what would the probability that the cross product produces an offspring that is AA bb Cc dd
product rule, 1/32
product rule, 1/4
binomial expansion, 1/32
binomial expansion, 1/4
in dogs, brown fur color (B) is dominant to white (b). a cross is made between two heterozygotes for fur color. if the litter consists of six puppies, what is the probability that half of them will be white
6.6%
13%
25%
26%
which of the following operations could be used for hypothesis testing
product rule
binomial expansion
chi square testing
all of the above
