WorksheetsGenetics Exam Review
Total questions: 50
Worksheet time: 1hrs 21mins
What mutation has occurred here?
T-G-A-C-C-A
T-G-A-G-C-A
Substitution
Deletion
Insertion
Frameshift
Which of the following would result in a frameshift mutation?
Insertions only
Substitution only
Deletion only
Insertions and Deletions
DNA molecule segment is : TTACGCAAG
The mutated DNA segment is TTCGCAAG. This is an example of ___ mutation.
Substitution
Deletion
Insertion
Inversion
A mutation is defined as:
A change in the cell's structure
Anything that changes in an embryo
Any change in the physical features of a human
A change in the DNA sequence
Why are insertion and deletion (frameshift) mutations so harmful?
They change all of the codons from the mutation on down the line, which changes the amino acid sequence
They insert things that an organism doesn't need.
They often delete things that organisms need.
Insertion and deletions are not any more harmful than substitution mutations.
Which mutation will cause translation to stop?
Mutations 1 and 3 only
Mutation 1 only
Mutation 2 only
Muations 1, 2, 3
Which type of mutation does the model demonstrate?
Deletion
Substitution
Insertion
Translocation
In the punnett square below, what belongs in the missing square
If one allele for a trait is dominant and the other allele is recessive, which trait will be visible? The dominant allele or the recessive allele?
Dominant will be visible because it is blocked by the recessive allele.
Dominant will be visible because it hides or blocks the recessive allele.
Recessive will be visible because it is blocked by the dominant allele.
Recessive will be visible because it hides or blocks the dominant allele.
What allele combination should go in the missing box?
AA
Aa
aa
none of these
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
0%
25%
50%
75%
In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?
0%
25%
50%
75%
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being white?
25%
0%
100%
50%
Which of the following is the genotype for a purebreed dominant alleles?
ggYy
GGYy
Ggyy
GGYY
Codominance occurs in calico cats, which allows for the Black and Tan colors to show. What percentage of the offspring represented in this P square will be calico (black and tan spotted)?
25%
50%
75%
100%
Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (WW)? What color are flowers that are RW?
Red and white spotted
Red
Pink
White
Based off this punnett square, what fraction of the offspring will have wrinkled, green seeds?
9/16
3/16
1/16
16/16
Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?
9/16
3/16
1/16
16/16
This type of inheritance pattern is a MIXTURE of two traits. This is known as ---
incomplete dominance.
codominance
When one allele is not dominant over the other, resulting in both traits expressed in a heterozygous individual.....
Incomplete Dominance
Codominance
A woman with curly hair and a man with straight hair produced a child with wavy hair:
Incomplete dominance
Codominance
Complete dominance
A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have red (RR) flowers?
0%
25%
50%
100%
Who was the Austrian monk that experimented on pea plants and is called the "father of genetics"? (a)
If something is heterozygous, it is also _____
purebred
hybrid
dominant
recessive
Which of the following is true about blood type O?
It contains antigen A only.
It contains antigen B only.
It contains both antigen A and antigen B.
It doesn’t contain antigen A or antigen B.
Mom was black. Dad was white. What is the most likely explanation?
complete dominance
incomplete dominance
codominance
polygenic inheritance
multiple alleles
Mom and dad are star belly sneeches. Baby does not have a star. What is the best explanation for this?
complete dominance
incomplete dominance
codominance
polygenic inheritance
multiple alleles
If a dark brown horse and a white horse are bred, the offspring are palomino (tan). This is an example of:
complete dominance
incomplete dominance
codominance
polygenic inheritance
multiple alleles
This flower is produced by crossing a pink-flowering plant and a white-flowering plant. This is an example of:
complete dominance
incomplete dominance
codominance
polygenic inheritance
multiple alleles
When one allele is not dominant over another, resulting in a blended phenotype for heterozygous offspring is considered....
Incomplete Dominance
Codominance
Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).
Cross a red flower with a speckled flower. What is the phenotypic ratio?
2 red, 2 speckled
2 red, 2 blue
2 blue, 2 speckled
Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).
Cross two speckled flowers.
1 red, 2 speckled, 1 blue
2 red, 2 blue
2 blue, 2 speckled
1 red, 1 speckled, 2 blue
In mice coat color is incompletely dominant. Black and white are homozygous. Brown mice are heterozygous.
What is the genotype for a brown mouse?
BB
Bb
bb
