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WorksheetsUnit 9 Genetics
Total questions: 52
Worksheet time: 28mins
Who is the "Father of Genetics"?
Gregor Mendel
Robert Hooke
Leewenhoek
Rudolf Virchow
What was Gregor Mendel's occupation?
He was a botanist
He was a medical doctor
He was a monk
He was a gardener
The passing on of traits from one generation to the next is known as....
genes
heredity
mitosis
cell division
Mendel reached several conclusions that later became known as _____.
heredity
genetics
Laws of nature
Mendel's Laws
Genetics is the study of ______
diversity
living things
heredity
animals
The process of meiosis results in _____.
gametes
identical nuclei
diploid cells
new species
What is special about sperm and egg cells compared to somatic cells?
They cannot have genetic mutations
They have half the number of chromosomes as somatic cells
They are identical to each other
They are not passed on to offspring
Each organism has two different forms of traits. Where does each form of a trait come from?
traits can also come from grandparents
both forms are inherited from the father only
one comes from the mother and one from the father
both forms are inherited from the mother only
Mendel notices that some traits appeared more often than others and one trait was able to "hide" the other trait. Which Mendelian law is this?
Law of Dominance
Law of Independent Assortment
Law of Segregation
Law of nature
If a mother has blue eyes and a father is a carrier for blue eyes, is it possible for the offspring to have blue eyes?
Yes, it can receive a recessive allele from the mother and the father
No, only the mother has the recessive allele for blue eyes
No, since the father is only a carrier he cannot donate a recessive allele
Yes, even if only one recessive allele is inherited the child can have blue eyes.
If an organism has one dominant allele, then
that allele came from the father
the organism may or may not have the dominant trait
the recessive trait can show up in some cases
the dominant trait will show up
Under which circumstances will a recessive trait show up in the phenotype?
When there is at least one recessive trait present
When both inherited traits are recessive
When the recessive trait comes from the mother
When the recessive trait comes from the father
Under which circumstances will a dominant trait show up in the phenotype?
When the dominant trait comes from the father
When at least one dominant allele is present
When both alleles are dominant
When the dominant trait comes from the mother
How is a dominant allele represented?
by a capital letter
by a lowercase letter
by vowels
by numbers
How is a recessive allele represented?
by vowels
by numbers
by a lowercase letter
by a capital letter
Which genotype will give an offspring with blue eyes if blue eyes are recessive? (select all that apply)
Bb
bb
BB
bbb
Which genotype means the offspring will have brown eyes if brown eyes are dominant? (select all that apply)
Bb
BB
bb
bbb
Which genotype is heterozygous?
gGg
Gg
GG
gg
Which genotype is homozygous recessive?
hh
Hh
HH
hHh
Which genotype is homozygous dominant?
HHH
HH
Hh
hh
The prefix "homo" means.....
inherited
different
the same
recessive
The prefix "hetero" means....
genotype
inherited
the same
different
The prefix "mono" means....
one
two
recessive
cross
In a monohybrid cross, how many traits are being observed?
maternal traits
two or more traits
one trait
two traits
In a dihybrid cross, how many traits are being studied?
two traits
one trait
two or more traits
paternal traits
The prefix "di" means....
three
one
two or more
two
The physical traits of an organism that can be seen by others.
inherited traits
genetics
phenotype
genotype
How can you observe the phenotype of a guinea pig?
do a test cross
look at it
make a Punnett square
look at its karyotype
Which best describes the genotype for a heterozygous guinea pig for the brown fur trait?
It has a dominant allele and a recessive allele for fur color
It is brown
It has hair
It has two dominant alleles for fur color
Mendel observed that each allele for a trait separates during meiosis so that each gamete only has only one form of the gene. Which law is this?
Law of nature
Law of Independent Assortment
Law of Segregation
Law of Dominance
One allele always comes from the mother and one allele always comes from the father.
False, each parent can contribute one or more alleles for a particular trait
True, each parent only contributes one allele for a particular trait
True, mothers always contribute recessive alleles and fathers dominant alleles
False, the mother can contribute two or more alleles for each trait
If you cross a heterozygous parent and a homozygous recessive parent, what will be the offspring according to a Punnett square?
Hh,Hh,hh, hh
HH, Hh,Hh, hh
Hh, Hh, Hh, hh
Hh, hh, hh, HH
If you cross a homozygous dominant parent with a homozygous recessive parent, what will be the offspring according to a Punnett square?
bb, bb, BB, BB
BB, bb, bb, Bb
Bb, Bb, Bb, Bb
BB, Bb, Bb, bb
If you cross two heterozygous parents, what will be the resulting genotypes of the offspring according a Punnett square?
Rr, rr, rr, rr
Rr, Rr, Rr, Rr
RR, RR, rr, rr
RR,Rr, Rr, rr
The chance that a certain even will occur is known as....
Inheritance
Probability
Law of chance
randomness
A diagram that shows all possible gene combinations is a _____.
Punnett square
a pedigree
a karyotype
Electrophoresis
If two heterozygous parents are crossed, what is the GENOTYPIC ratio of the offspring according to your Punnett square?
1:2:1
3:1
1:1:1
2:2
If two heterozygous parents are crossed, what is the PHENOTYPIC ratio of the offspring according to your Punnett square?
1:2:1
3:1
2:2
1:1
All chromosomes other than the sex chromosomes are called....
X chromosomes
somatic chromosomes
gametes
autosomes
If a disease is "sex-linked" what does that mean?
The disease only affects one gender
only males can get the disease
the disease is found on the sex chromosomes (X or Y) of an organism
the disease must be inherited from the father
Which best describes a chromosomal disease?
When the mutation is on every chromosome except the X or Y
When the mutation is on the X or Y chromosome only
when a chromosome is missing or there is an extra chromosome
When a chromosome has a point mutation
If an organism has only one defective gene, he or she is called a/an.....
carrier
affected organism
homozygous organism
mutant
An autosomal recessive disorder that causes build up of sticky mucus in the lungs.
cystic fibrosis
Tay-Sachs
Down Syndrome
Red-green colorblindness
A chromosomal disorder that has too many copies of chromosome 21.
hemophilia
Cystic fibrosis
Down's Syndrome
Tay-Sachs
A treatable autosomal recessive disorder that lacks an enzyme needed to break down amino acids in protein.
cystic fibrosis
Down Syndrome
Tay-Sachs
PKU
An autosomal recessive disorder that has no cure and causes build up of fatty material around the brain and spinal cord. Infected individuals rarely live past the age of four years old.
Cystic fibrosis
Tay-Sachs
Down syndrome
hemophilia
Which disease is NOT found on autosomes?
PKU
Tay-Sachs
cystic fibrosis
hemophilia
How many traits are being observed in a dihybrid cross?
one
two
three
two or more
If the genotype of a parent is GgHH, what are the possible combinations of the these traits?
GH,GH,gH,gH
GH,GH,gh,gh
gh,Gh,GH,gH
gH,gH,gH,gh
Make a dihybrid cross for these parents: GgHH and ggHh. Where "G" represents brown hair and "gg" represents red hair. "H" represents freckles and "hh" represents no freckles.
How many offspring will have brown hair and freckles?
*HINT: you will have to get the possible combinations of each parent before crossing. You will need a 4x4 Punnett square
5
8
4
12
Mendelian law that states inheriting one trait does not affect the inheritance of another trait.
Law of Segregation
Law of Independent Assortment
Law of Dominance
Law of nature
Which Punnett square represents a dihybrid cross?
