Punnett Squares
Blood Types
Mendelian Exceptions 1
Gene Technology
Misc.
100
A cleft chin in humans is coded by the dominant allele C. A chin without a cleft is coded by the recessive allele c. A man with a cc allele combination for the trait produces a zygote with a woman with a Ccallele combination for the trait. Which allele combinations could occur in the zygote?
A
Cc or cc
B
CC or Cc
C
CC only
D
Cc only
Cc or cc
100
Two people believe they are related. Which would be thebest technique to determine if they are related?
A
testing blood types
B
comparing DNA
C
examining karyotypes
D
testing for genetic disorders
comparing DNA
100
The ability to roll the tongue in humans is coded by the dominant allele R. The inability to roll the tongue is coded by the recessive allele r. A man with an RR allele combination for the trait produces a zygote with a woman with an rr allele combination for the trait. Which allele combination could occur in the zygote?
A
RRrr
B
rr
C
Rr
D
RR
Rr
100
A forensic scientist needs to determine whether the DNA left at a crime scene was left by one of the suspects in the crime. How can restriction enzymes help determine if the DNA was from the suspect?
A
Use restriction enzymes to produce fragments that can be compared using DNA microarray tests.
B
Use restriction enzymes to separate the nucleic acids so percentages can be compared between samples.
C
Use restriction enzymes to cut the suspect’s DNA into the same size fragments as the unknown sample.
D
Use restriction enzymes to replicate and increase the quantity of genetic material recovered from the crime scene.
Use restriction enzymes to cut the suspect’s DNA into the same size fragments as the unknown sample.
100
What is the BEST way to identify the external phenotype of an animal?
A
observation
B
DNA analysis
C
electron microscopy
D
dissection
observation
200
When Mendel was experimenting with pea plant crosses, one of the traits that he examined was seed texture. The two phenotypes are smooth and wrinkled. The totals for his F2 generation were 5,474 smooth and 1,850 wrinkled seeds. Which probability ratio best predicts this outcome?
A
2:1
B
3:1
C
4:1
D
5:1
3:1
200
What is the chance of two parents with blood types AB and O producing an offspring with blood type O?
A
0%
B
25%
C
50%
D
75%
0%
200
A student observes several slides with different cell types under a microscope.
SlideType of CellsSlide 1Liver cell of a mouseSlide 2Sperm cell of a humanSlide 3Skin cells of a humanSlide 4Egg cells of a mouse
Which pair of slides contains cells that resulted from meiosis?
A
Slide 1 and Slide 3
B
Slide 2 and Slide 4
C
Slide 2 and Slide 3
D
Slide 1 and Slide 4
Slide 2 &4
200
Scientists can use a virus as a vector to insert a gene directly into a target cell in someone’s body. What is this technique called?
A
genetic cloning
B
human gene therapy
C
DNA microinjection
D
embryonic stem cell transfer
human gene therapy
200
Fraternal twins may or may not share similar characteristics due to
A
independent assortment.
B
polygenic inheritance.
C
incomplete dominance.
D
multiple alleles.
independent assortment
300
The gene for black fur (B) is dominant over the gene for white fur (b) in mice. A homozygous dominant female and a heterozygous male produce 200 offspring during their lifetime. Approximately how many offspring would be expected to be homozygous dominant?
A
25
B
50
C
100
D
200
100
300
The ABO blood group has three different alleles: IA, IB, and i. The genotypes and phenotypes (blood types) for different combinations of the three alleles are shown in the table.
Possible Genotype
and Phenotypes of
ABO Blood GroupGenotypesPhenotypes
(Blood types)IAIA or IAiType AIBIB or IBiType BiiType OIAIBType AB
What percentage of offspring from a cross between a homozygous Type A parent with a heterozygous Type A parent is expected to contain the iallele?
A
25%
B
50%
C
75%
D
100%
50%
300
Sickle cell anemia is an autosomal recessive disorder. If each parent carries one sickle cell allele, what are the chances that their child will have sickle cell anemia?
A
no chance
B
one in four
C
two in four
D
three in four
one in four
300
Police are trying to identify the person who left behind a blood stain during a burglary. They have identified four possible suspects, and submitted DNA samples from each suspect to the crime lab for comparison to the blood sample DNA. The crime lab produced the following image of the DNA fingerprinting analysis.
Which suspect MOST likely left behind the blood stain?
A
Suspect #1
B
Suspect #2
C
Suspect #3
D
Suspect #4
Suspect 4
300
Which of the following events during meiosis contributes MOST to the variation within a species?
A
pairing of chromosomes
B
creation of haploid gametes
C
segregation of alleles
D
separation of chromatids
segregation of alleles
400
A student notes that an individual has attached earlobes, a recessive trait in humans. A cell is taken from this individual, and the alleles for the trait are isolated. What is the probability that one of the alleles was inherited from the individual’s mother?
A
0%
B
50%
C
75%
D
100%
50%
400
What is the letter used when crossing blood types?
A. A
B. I
C. B
D. O
I
400
The law of segregation predicts which phenomenon during gamete formation?
A
Two dominant alleles placed adjacently in the parent’s genome will pass on to different gametes.
B
Dominant alleles will be passed on to gametes slightly more than half of the time.
C
When both recessive and dominant alleles for a trait are present in the parent, both will be passed on to the same gamete.
D
A single random allele from each pair of parent alleles will be passed on to the gamete.
A single random allele from each pair of parent alleles will be passed on to the gamete
400
Biologists estimate that climate change will result in a minimum of 15–40% of species becoming extinct by the year 2050. How might the creation of transgenic organisms help reduce the number of species lost?
A
by increasing the chances of restoring a species if it goes extinct
B
by reducing the possibility of a species dying from mutated viruses
C
by creating new plant species that are less susceptible to climate changes
D
by helping endangered species to adapt more rapidly to environmental changes
by helping endangered species to adapt more rapidly to environmental changes
400
The image below shows a kitten and its two parents.
What process during meiosis is MOST likely responsible for creating the variation seen in the kitten compared to its two parents?
A
independent assortment of alleles
B
separation of the sister chromatids
C
pairing of homologous chromosomes
D
production of haploid daughter cells
independent assortment of alleles
500
Tay-Sachs disease is a lethal, autosomal recessive genetic disorder. If both parents are heterozygous carriers of the disease, what are the chances of them having a child who is also a heterozygous carrier for Tay-Sachs?
A
25%
B
50%
C
75%
D
100%
50%
500
A mother is heterozygous for blood type A and a father has blood type AB. What is the probability that their offspring would have type A blood?
A
0%
B
25%
C
50%
D
75%
50%
500
An error in gamete formation results in a zygote with an XXY chromosome combination. Which characteristic of an individual is affected by this combination?
A
cellular respiration
B
gender-linked traits
C
muscle protein structure
D
nervous system formation
gender-linked traits
500
Maggie is a transgenic goat. How does being transgenic make Maggie different from non-transgenic goats?
A
Maggie has DNA from both of her parents.
B
Maggie has DNA that winds around proteins.
C
Maggie has DNA implanted from another organism.
D
Maggie has DNA that uses a different coding system.
Maggie has DNA implanted from another organism
500
All of the following events occur during prophase in mitosis EXCEPT
A
pairing of chromosomes.
B
spindle formation.
C
crossing over.
D
condensation of DNA.
crossing over