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WorksheetsGenetics Unit 6 Test Review
Total questions: 43
Worksheet time: 22mins
Genetics is the study of
cells
alleles
heredity
parents
If you cross a purebred tall pea plant with a purebred short pea plant, all of the F1 generation ___________
will show the dominant trait
will show the recessive trait
show incomplete dominance
are also purebred
Alternate forms of a gene
chromosome
hybrid
allele
phenotype
A section of DNA that controls a trait
gene
chromosome
dihybrid
Punnett square
Two identical alleles for one trait
Heterozygous
Polyzygous
Homozygous
Recessive
Two different alleles for one trait
Heterozygous
Polyzygous
Homozygous
Recessive
A gene has more than two alleles
Polygenic Trait
Codominance
Incomplete Dominance
Multiple Alleles
Which of the following is not true about Punnett squares?
Shows the actual results of a genetic cross
Shows the possible results of a genetic cross
Shows the genotypes of the offspring
Shows the alleles in the gametes of each parent
How do you know which allele is dominant in a heterozygote?
it is the more common allele
it is expressed over the other allele
it is the stronger allele
it is the more desirable allele
Two genes are on the same chromosome and don't assort independently. Which of the following is true?
The genes are located far apart on the same chromosome
crossing over will never occur
The genes are linked and very close together on the same chromosome
crossing over will always occur
In wolves, brown fur color is dominant to grey fur color. If a homozygous brown wolf is crossed with a grey wolf and has 6 offspring, how many will have grey fur?
0
3
6
12
The phenotypic ratio of a monohybrid Punnett square where both parents are heterozygous
1:1
1:2:1
9:3:3:1
3:1
How many unique allele combination result from the genotype: BbDD
1
2
3
4
The phenotypic ratio of a dihybrid cross where both parents are heterozygous for both traits
1:1
1:2:1
9:3:3:1
3:1
Law that states during gamete formation genes for different traits separate independently without influencing each other’s inheritance
Law of Segregation
Law of Independent Assortment
Law of Dominance
Law of Probabilities
For incomplete dominance in flowers, red and white alleles together would make
red and white spotted flowers
pink flowers
red flowers
white flowers
For codominance in flowers, red and white alleles together would make
red and white spotted flowers
pink flowers
red flowers
white flowers
The probability of human offspring being born male versus female
100 % chance female, 0% chance male
75% chance male, 25% chance female
50% for both
60% chance female, 40% chance male
The main reason sex-linked recessive disorders are more common in males
Males only have 1 X chromosome
The Y chromosome can not have genetic disorders
The X chromosome is more important than the Y chromosome
Males have 2 X chromosomes
What does it mean if someone is a carrier for a genetic disorder?
The person does not have the disorder
The person does not have the disorder but can pass it on
The person has the disorder
The person will develop the disorder later on in life
What alleles must an XX female have to express a recessive sex-linked trait?
one dominant allele
only one recessive allel
two dominant alleles
both recessive alleles
Which two pairs of genes in the picture are most likely linked?
A and C, C and E
A and B; C and D
A and D; B and C
A and E; C and D
Which method can be used to quickly identify chromosomal disorders?
Karyotype
Pedigree
DNA fingerprinting
Polymerase Chain Reaction
Polygenic traits are the result of?
One gene
No Genes
Many Genes
Multiple Alleles
How might a child have a genetic disorder if neither parent has it?
The disorder is dominant
The disorder is the result of polygenic inheritance
The disorder is recessive
The alleles for the disorder are codominant
A type of family tree that shows the phenotype of individuals of multiple generations of a family
Karyotype
Pedigree
DNA fingerprint
Punnett Square
In Mendel's pea plant experiments, what is the possibility that a F2 plant shows the dominant trait when two F1 plants are crossed?
0%
25%
50%
75%
What is the 23rd pair of chromosomes called?
Autosomal Chromosomes
Allele Chromosomes
Sex Chromosomes
Polygene Chromosomes
A, B, AB, and O blood types are the results of what type of inheritance?
Incomplete Dominance
Multiple Alleles
Polygenic
Sex-linked
Which of the following genotypes result in the same phenotypes?
IAIA and IAIB
IBIB and IAIB
IBIB and IBi
IBi and ii
A genetically identical organism that was produced from copying the DNA of another organism
clone
genetic engineering
DNA fingerprinting
polymerase chain reaction
The process of making changes in the DNA code of a living organism
clone
genetic engineering
DNA fingerprinting
polymerase chain reaction
A process that can be used to identify a person
clone
genetic engineering
DNA fingerprinting
polymerase chain reaction
Which of the following processes would a scientist use to make an amount of DNA that is large enough to study
clone
genetic engineering
DNA fingerprinting
polymerase chain reaction
Both alleles in a Roan cow are equally expressed. What type of inheritance is this?
Incomplete dominance
Codominance
Multiple Alleles
Sex-linked
Use the DNA fingerprint to determine which suspect was at the crime scene
Barry
David
Diana
Tammy
What is the sex of the individual based on the karyotype?
Male
Female
What determination can be made of the individual based on the karyotype?
Healthy
Monosomy 18
Monosomy 21
Trisomy 21
What do the squares represent in the pedigree?
Males
Females
Person has the disorder
Person is a carrier of the disorder
What do the circles represent in the pedigree?
Males
Females
Person has the disorder
Person is a carrier of the disorder
What do the red shapes represent
Males
Females
Person has the disorder
Person is a carrier of the disorder
What do the half red shapes represent?
Males
Females
Person has the disorder
Person is a carrier of the disorder
A colorblind woman marries a man with normal vision. What are their genotypes?
XeXe and XEY
XEXE and XeY
XEXe and XeY
XeXe and XEYE
