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WorksheetsGenetics Test
Total questions: 50
Worksheet time: 11hrs 34mins
The science of how genes control traits is _____________.
heredity
genetics
homozygous
heterozygous
Two of the same genes controlling a trait (BB or bb) is _________.
heredity
genetics
homozygous
heterozygous
The passing of traits from parent to offspring is _________.
heredity
genetics
homozygous
heterozygous
Two different genes controlling a trait (Bb) is __________.
heredity
genetics
homozygous
heterozygous
The gene combinations for an organism is ___________.
Gregor Mendel
genotype
phenotype
Punnett Square
The "Father of Genetics" is ___________.
Gregor Mendel
genotype
phenotype
Robert Hooke
The physical expression from the gene combination is ___________.
hybrid
genotype
phenotype
Punnett Square
A tool used to predict possible outcomes of a cross is called a _______________.
purebred
genotype
phenotype
Punnett Square
A trait that is seen only if the dominant trait is absent is a _________.
dominant trait
recessive trait
pedigree
karyotype
A trait that is always seen if present is a ___________.
dominant trait
recessive trait
pedigree
karyotype
A tool that is used to trace a trait through a family is called a _____________.
dominant trait
recessive trait
pedigree
karyotype
An organized display of a person's chromosomes is called a _____________.
dominant trait
recessive trait
pedigree
karyotype
Each gene in a pair of genes is called a/an _______________.
gene
allele
mitosis
meiosis
The section on a chromosome that controls traits is called a/an ____________.
gene
allele
mitosis
meiosis
Cell division that produces sex cells (egg and sperm) is called _______________.
gene
allele
mitosis
meiosis
Cell division that produces body cells is called _____________.
gene
allele
mitosis
meiosis
A small section of DNA, humans have 23 pairs is called ____________.
DNA
chromosomes
egg
sperm
A long, twisted, double helix molecule found inside the nucleus is called ______________.
DNA
chromosome
egg
sperm
The male sex cell is called a/an ______________.
DNA
chromosome
egg
sperm
The female sex cell is called a/an _____________.
DNA
chromosome
egg
sperm
A Punnett Square is used to determine the
probable outcome of a cross.
actual outcome of a cross.
result of meiosis I.
sorting of DNA.
Which is NOT an example of Natural Selection ("Survival of the Fittest")?
Sick and/or old prey (like elk) are killed first by predators (like wolves).
An arctic hair born with a mutation that results in black hair will be killed first by predators.
Giraffes with long necks are able to obtain food easier and will be more likely to survive than giraffes with short necks.
Scientists selectively cross watermelons to produce seedless watermelons.
Why is it that males are most often affected by sex-linked disorders?
Because males are the weaker sex.
Because the Y chromosome is not a full chromosome and there is nothing there to dominate the recessive trait on the X.
Because the X chromosome is not a full chromosome and there is nothing there to dominate the recessive trait on the Y.
Because males have two X chromosomes.
Which of the following is NOT an example of a sex-linked disorder?
hemophilia
color-blindness
blue eyes
male pattern baldness
The changing of traits in an organism is called a ______________.
natural selection
cloning
mutation
selective breeding
A Widow's Peak is a dominant trait in humans. A homozygous dominant father (WW) and a homozygous recessive mother (WW) will have children that
have a Widow's Peak
are heterozygous
do not have a Widow's Peak
Have a Widow's Peak AND are heterozygous for this trait
Scientists use ________________ to encourage the best traits in organisms.
natural selection
mutations
cloning
selective breeding
The trait of tongue-rolling is a dominant trait in humans. A homozygous recessive father and a homozygous dominant mother have a child. The phenotype of the father is
non-tongue-roller
unable to be determined
homozygous recessive
tongue-roller
The trait of tongue-rolling is a dominant trait in humans. A homozygous recessive father and a homozygous dominant mother have a child. What is the probability that the offspring of this cross will be able to roll their tongues?
1/4 or 25%
2/4 or 50%
3/4 or 75%
4/4 or 100%
The trait of tongue-rolling is a dominant trait in humans. A homozygous recessive father and a homozygous dominant mother have a child. Which of the following statements is INCORRECT for the possible offspring for this cross?
None of the offspring will be able to roll their tongues.
All of the offspring will be able to roll their tongues.
All of the offspring are heterozygous.
All of the offspring are hybrids.
The trait of attached earlobes is a recessive trait in humans. A father who is heterozygous for free earlobes and a mother who has attached earlobes have a child. The genotype of the mother is
attached earlobes
ee
Ee
unable to be determined
The trait of attached earlobes is a recessive trait in humans. A father who is heterozygous for free earlobes and a mother who has attached earlobes have a child. What percentage of the offspring would have attached earlobes?
1/4 or 25%
2/4 or 50%
3/4 or 75%
4/4 or 100%
The trait of attached earlobes is a recessive trait in humans. A father who is heterozygous for free earlobes and a mother who has attached earlobes have a child. What percentage of the offspring would be heterozygous for this trait?
1/4 or 25%
2/4 or 50%
3/4 or 75%
4/4 or 100%
A mother who is a carrier for the sex-linked disorder, hemophilia, marries a normal father. Which offspring will show the trait of hemophilia?
A
B
C
D
None
A mother who is a carrier for the sex-linked disorder, hemophilia, marries a normal father. What percentage of the offspring will be a carrier for the trait of hemophilia?
100%
75%
50%
25%
0%
A mother who is a carrier for the sex-linked disorder, hemophilia, marries a normal father. What is the chance that one of their girls will have hemophilia?
100%
75%
50%
25%
0%
A mother who is a carrier for the sex-linked disorder, hemophilia, marries a normal father. Offspring D is
a male with hemophilia
a carrier male
a normal male
a normal female
This chart traces the trait of freckles through three generations. Freckles is a dominant trait in humans. The chart can best be described as a
Punnett Square
Family Tree
Karyotype
Pedigree
This chart traces the trait of freckles through three generations. Freckles is a dominant trait in humans. How many children and what gender did the parents from Generation I have?
Three children, 1 boy and 2 girls.
Three children, 1 girl and 2 boys.
Four children, 2 boys and 2 girls.
Four children, all boys.
This chart traces the trait of freckles through three generations. Freckles is a dominant trait in humans. What is the genotype of Individual #1 in Generation II?
Ff
ff
FF or Ff
unable to be determined
This chart traces the trait of freckles through three generations. Freckles is a dominant trait in humans. Which statement is true about Individual #4 in Generation II?
The individual is a biological child of individuals #1 & 2 from Generation I.
The individual is heterozygous for the trait of freckles.
The individual is homozygous recessive for the trait of freckles.
The individual has freckles.
This chart traces the trait of freckles through three generations. Freckles is a dominant trait in humans. Which statement is TRUE about Generation III?
They are both males.
They have the same genotype and phenotype.
They have different genotypes but the same phenotype.
One has freckles and one does not.
From the "Crazy Traits" lab, what information did the letters on the blue and green coins indicate? Both coins were heterozygous (Tt) and were flipped to determine physical traits of your creature.
genotype
phenotype
gender
Therapeutic cloning is
illegal
making an exact copy of an animal or person
making "spare parts" to help the sick by creating replacement organs or tissues
not a way to help treat diseases
Reproductive cloning is
illegal
making an exact copy of an animal or person
making "spare parts" to help the sick by creating replacement organs or tissues
impossible in mammals
Purebred is another word for homozygous.
True
False
Male sex chromosomes are represented by XX.
True
False
Female sex chromosomes are represented by XY.
True
False
It is IMPOSSIBLE for offspring to display (phenotype) a trait that their parents do not display.
True
False
If a child looks more like their father than their mother, this means that they got more genes from their father.
True
False
