WorksheetsBiology Unit 3: Genetics Practice Test
Total questions: 41
Worksheet time: 26mins
Hair color, skin color and eye color are all examples of a person's
A) recessive traits
B) dominant alleles
c) phenotype
D) genotype
A cattle farmer genetically crosses a cow (female) with a white coat with a bull (male) with a red coat. (offspring) is roan, which means there are red and white hairs intermixed in the coat of the calf. This i which of the following patterns of inheritance?
A) incomplete dominance
B) codominance
multiple alleles
D) simple dominance
What do the letters inside the grid of a Punnett square represent?
(A) phenotypes of parents
B testcrosses of offspring
C) genotypes of offspring
D chromosomes of parents
Who is the "Father of Genetics?"
A) James Watson
B) Gregor Mendel
c) Francis Crick
D Nicholas Irwin
A person who is heterozygous for a disorder caused by recessive alleles is a carrier of a disorder. A carries is a person who
A does not have the disorder but can pass it on to offspring
B can develop the disorder later in life but cannot pass it on
c) has a dominant normal allele that has been inactivated
D passes the disorder to offspring on the Y chromosome only
Eye color, hair color, and skin color are polygenic traits. Polygenic traits result from
A recessive genes
B codominant genes
c) many genes
D) epistatic genes
In the case of codominant alleles, an animal that is homozygous for black fur is crossed with a homozygous for white fur. The offspring will be
A completely black
B white and black
c) gray
D completely white
A chart that traces the phenotypes and genotypes within a family is called a
A pedigree
B Punnett square
(c) karyotype
D chromosome map
In a particular species of mice, a single gene (B or b) determines tail length. The short-tail allele is sex dominant. Shading in the pedigree below indicates that an individual has a short tail. The pedigree sh of inheritance of the short-tail allele over three generations of mice. Individual 6 is female. What is the genotype of individual 6?
A) XB Xb
B) Xb Xb
c) XBY
D XbY
Using the karyotype in the image, identify the gender of the patient.
male
female
cannot be determined
A partial Punnett square is shown. Which of the following statements describes the parental genotypes that would result in this Punnett square?
A Both parents are heterozygous
B Both parents are homozygous dominant
c) One parent is homozygous recessive the other is heterozygous
D One parent is homozygous dominant, the other is heterozygous
Pea plants have seeds that are either round or wrinkled. In this cross, what will be the phenotypic rat offspring?
50% RR and 50% Rr
25% RR, 50% Rr, and 25% rr
50% round seeds and 50% wrinkled seeds
100% round seeds
The observed trait that appears in an organism as a result of its genetic makeup is called the organis
genotype
phenotype
karyotype
allele
According to the Punnett square: B represents the dominant gene for blue feathers and b represents the recessive gene for red feathers. Two heterozygous birds have one offspring. What percent chance does it have for red feathers?
100%
25%
75%
0%
Pea plants have seeds that are either round or wrinkled. In this cross, what will be the phenotypic rat offspring?
50% RR and 50% Rr
25% RR, 50% Rr, and 25% rr
50% round seeds and 50% wrinkled seeds
100% round seeds
The observed trait that appears in an organism as a result of its genetic makeup is called the organis
B) genotype
c) phenotype
D) karyotype
In a certain variety of chicken, some offspring have a feather pattern that is black-and-white checkere this checkered feather pattern result from the cross of a black chicken with a white chicken. Which of the following types of inheritance is most likely responsible for the checkered feather patte
A) codominant
B) dominant
c) polygenic
D sex-linked
How many generations are shown in the pedigree above?
4
12
5
9
Why are sex-linked conditions more common in men than in women?
A) Men acquire two copies of the defective gene during fertilization.
B Men need to inherit only one copy of the recessive allele for the condition to be fully expressed.
(c) Women simply do not develop the disease regardless of their genetic composition.
D The sex chromosomes are more active in men than in women.
The genotype Tt shows the
A) dominant
B recessive
The genotype tt shows the
A) dominant
B recessive
The genotype Tt is
A) homozygous
B) heterozygous
The genotype tt is
A) homozygous
B) heterozygous
A monohybrid cross is
(A) the second generation of a self-fertilized plant.
B) a breeding experiment in which the parental varieties have only one trait in common.
c) a breeding experiment in which the parental varieties differ in only one trait.
D a triploid plant that results from breeding two very different plants.
What is the normal pair of sex chromosomes in a human male?
A) two X chromosomes
B two Y chromosomes
D one X chromosome and one Y chromosome
B one Y chromosome
Any gene located on a sex chromosome
A) is called a recessive gene.
B) is called a sex-linked gene.
c) is called a dominant allele.
D) will exhibit pleiotropy.
The genotype TT is
A dominant
B recessive
Mendel conducted his most memorable experiments on
A) peas.
B roses.
c) guinea pigs.
D fruit flies.
Below are some traditional DNA fingerprints of a biological mother, the child, and biological fathers. Which male is most likely the biological father?
Male 1
Male 2
Male 3
Male 4
The passing on of traits and behaviors from parents to their offspring is
offspring
heredity
DNA
genes
Which statement/statements is/are true?
Inherited traits are physical features that you are born with.
An acquired trait is a physical feature that you get as a result of something you do or because of an experience.
Inherited means to pass from offspring to parents through genes in cells.
You are born with learned behaviors.
Aa, DD, Bb, yy are all examples of _______
genotypes
phenotypes
Where is the majority of DNA stored within a cell?
Chloroplast
Cell wall
Cell membrane
Nucleus
Which statement is true?
Your DNA is identical to your siblings.
Your DNA is identical to your father's.
Your DNA is identical to your mother's.
Your DNA is unique to you.
Aabb
Abab
AAbb
aaBb
Match the following combinations of alleles:
Homozygous dominant
DD
Homozygous recessive
dd
Heterozygous
Dd
