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WorksheetsGenetics Unit
Total questions: 35
Worksheet time: 18mins
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the best description for the genotype of any red-flowering plant resulting from this species?
Red and white alleles present on one chromosome
Red and white alleles present on two chromosomes
A red allele present on both homologous chromosomes
A red allele present on at least one of two homologous chromosomes
Use the table to answer the question. Blood type is inherited through multiple alleles, including Iᴬ, Iᴮ, and i. A child has type A blood. If the father has type AB blood, what are all the possible phenotypes of the mother?
Phenotypes O, A, B, AB
Phenotypes O or A
Phenotypes A or AB
Phenotypes A, B, AB
Which statement describes a cell process that is common to both eukaryotic and prokaryotic cells when carrying out the process of protein synthesis?
Both cell types carry out transcription in the nucleus.
Both cell types use ribosomes to carry out translation.
Both cell types assemble amino acids to carry out transcription.
Both cell types carry out translation in the endoplasmic reticulum.
In the diagram, which type of change in chromosome composition is illustrated in the diagram?
Deletion
Insertion
Translocation
Inversion
A genetic mutation resulted in a change in the sequence of amino acids of a protein, but the function of the protein was not changed. Which statement best describes the genetic mutation?
It was a silent mutation that caused a change in the DNA of the organism.
It was a silent mutation that caused a change in the phenotype of the organism.
It was a nonsense mutation that caused a change in the DNA of the organism.
It was a nonsense mutation that caused a change in the phenotype of the organism.
An inversion occurs along part of a chromosome. How does the inversion most likely affect the region in which it occurs?
Recessive alleles in the region become dominant alleles.
The information in the region is read differently during transcription.
The coding sequence in the region disappears entirely from the cell.
Multiple frame-shift errors in the region are triggered after translation.
A scientist observes that certain traits are determined by a single allele. A chicken inherited black feathers from one parent and white feathers from the other parent. Both colored feathers are expressed in the phenotype of the offspring. Which pattern of inheritance best classifies the observed trait?
Dominance
Sex-linkage
Co-dominance
Incomplete dominance
The bacterium Acetobacter aceti is found in acidic environments and has an acidic cytoplasm. For this reason, most of the proteins it produces during protein synthesis are able to function in acidic conditions. This property distinguishes Acetobacter aceti proteins from those of most other organisms. Which characteristic does Acetobacter aceti most likely share with other organisms?
The method that the organism uses to reproduce itself
The physical and chemical responses to environmental changes
The type of organelle used to produce energy for cellular functions
The process used to form proteins by transcription and translation
A mutation occurs at the midpoint of a gene’s codon, altering all amino acids encoded after the point of mutation. Which mutation could have produced this change?
Deletion of two nucleotides
Deletion of three nucleotides
Insertion of six nucleotides
Insertion of twelve nucleotides
For the pedigree chart, shaded symbols represent afflicted people. Males are squares; Females are circles. If the trait is a sex-linked trait carried on the X chromosome, what is true about the mother represented by circle 1?
She has two alleles for the disorder.
She has one allele for the disorder.
She has no alleles for the disorder.
She has the genotype XXY.
Each pea-plant gamete has how many alleles for the height gene?
1
2
3
4
The principles of probability:
can be used to predict the traits of the offspring of genetic crosses.
can be used to determine the actual outcomes of genetic crosses.
can be used to determine which species should be used in genetic crosses.
can be used to decide which organisms are best to use in genetic crosses.
A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is:
25%
50%
75%
100%
A bird has bright red feathers that are represented with the alleles rr. These alleles are an example of:
hybrid
heterozygous
homozygous
dominant
A squirrel has a dark brown long tale. When the squirrel creates gametes the dark brown color and the length of the tale do not move with each other. This is an example of:
Mendelian's law of dominance
Mendelian's law of independent assortment
Mendelian's law of probabilities
Mendelian's law of segregation
A salamander has an allele for red skin and an allele for blue skin. Its resulting skin color is both red and blue. This is an example of:
multiple alleles
codominance
polygenic inheritance
incomplete dominance.
A pink flower is the result of crossing the following parents: Red x White. The result color of the pink flower is an example of.
incomplete dominance.
polygenic inheritance.
codominance.
multiple alleles.
Variation in human skin color is an example of:
incomplete dominance.
codominance.
polygenic traits.
multiple alleles.
Which of the following supports the claim that the environment can affect genetic traits?
Oak trees get taller as they grow.
The fur around a snow rabbit's foot turns from white to black during the winter.
Dandelion plants are self pollinating.
Pinion pine trees bear cones every other year.
According to the figure, what is the probability that a human offspring will be male?
10%
25%
75%
50%
A fly has 48 chromosomes. A scientist creates a karyotype of the fly's gamete cell. How many chromosomes will the scientist see on the karyotype?
2
24
44
48
Colorblindness is dominant trait attached to the X chromosome. Which is true?
The trait is more common in females.
The trait is more common in males.
The trait is found in equal proportions of males an females.
The trait will disappear in the population.
Human males have:
One X chromosome only
2 X chromosomes
one X and one Y chromosome.
2 Y chromosomes
Which of the following pairs of genotypes have the same phenotype?
IᴬIᴬ, IᴬIᴮ
IᴮIᴮ, Iᴮi
IᴮIᴮ, IᴬIᴮ
IᴮIᴮ, Iᴬi
If a man with blood type A and a woman with blood type B produce an offspring, what might be the offspring’s blood type?
AB or O
A, B, or O
A, B, AB, or O
AB only
Pick that statement that is true:
The Human Genome Project is an attempt to sequence every person’s DNA.
The Human Genome Project is an attempt to sequence the DNA of every human gene.
The Human Genome Project is an attempt to cure infectious human diseases.
The Human Genome Project is an attempt to identify all restriction enzymes.
In the Punnett square shown, the genotypes of the offspring are: (choose all that are correct)
TT
Tt
tt
In the Punnett square shown, the phenotype of top parent 1 is
TT
Tt
tall
short
In the Punnett square shown, the genotype of the parent on the left side of the Punnett square is
TT
Tt
tall
short
If a couple has five boys, the probability that the next child will be a boy is
25%
33%
50%
100%
In protein synthesis shown, what is the process that takes place between letter A and B?
transmutation
transcription
translation
translocation
In protein synthesis shown, what is the process that takes place within letter C?
transmutation
transcription
translation
translocation
If the pedigree shows an autosomal recessive disorder, what do we know about the woman represented by circle 6?
her circle should be fully shaded in
she is homozygous dominant
she is homozygous recessive
she is a carrier
If the pedigree below shows an autosomal recessive disorder, what is the probability of persons #5 and #6 have another child with the disorder?
0%
25%
100%
there is not enough information to determine the probability
If the pedigree shows an autosomal recessive disorder, how many nephews of person #6 have the disorder?
0
1
2
3
