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WorksheetsGenetic test 2021
Total questions: 41
Worksheet time: 25mins
The _____ produced by two parents are shown inside of a Punnet square
zygotes
offspring
gametes
hybrids
The term that best describes an organism with the allele combination Bb is...
Homozygous dominant
Homozygous recessive
Heterozygous
Hemizygous
According to Mendel's Laws, the alleles that control each trait separate. How many of the alleles for each trait is (are) passed down to the offspring?
one
two
three
four
A father determines whether his child is a boy or girl. What will a father donate to produce a son?
an X chromosome
a Y chromosome
an XX pair of chromosomes
an XY pair of chromosomes
What does the term phenotype mean?
the observable characteristic of an individual
the allele combination of an individual
how an organism looks
when one allele in a gene is dominant and one allele is recessive
Genes located on homologous chromosomes are made up of two parts. We call these parts __________ .
alleles
centromeres
phenotypes
gametes
According to Mendel's Laws, the possible allele combinations that could be found in gametes produced by an organism with the genotype BbDd are…
Bb, Dd, BB, and DD
BD, bD, Bd, and bd
BbDd and BDbd
Bd and bD only
The letters located outside a Punnet square refer to
the offspring a couple produces
the genotype a person produces
the alleles found in gametes produced by the parents
the phenotype description
The type of inheritance shown when a red-flowering plant is crossed with a white-flowering plant and only pink-flowering plants are produced is called _____.
co-dominance
incomplete dominance
multiple alleles
sex linked trait
A trait controlled by more than two alleles is said to have _____.
homologous alleles
autosomes
hybridization
multiple alleles
The 23rd pair of chromosomes that differ in males and females are called _____.
autosomes
sex chromosomes
multiple alleles
polygenes
Because the gene for red-green color blindness is located on the X chromosome, it is normally not possible for a _____.
carrier mother to pass the gene on to her daughter
carrier mother to pass the gene on to her son
color blind father to pass the gene on to his daughter
color blind father to pass the gene on to his son
How can two healthy parents produce a child with a genetic disorder?
the disorder is not genetic
both parents carry the recessive gene for the disorder
the disorder is a chromosomal mutation that occurred during development and is not related to the parental genotypes
none of the above can explain how two healthy parents can produce a child with a genetic disorder
A genetic cross involving two different traits is referred to as...
a mono-hybrid cross
a dihybrid cross
a multi trait cross
a test cross
The number of times a genotype appears in the offspring (for example 4:0 are heterozygous to homozygous) refers to...
the phenotypic ratio
the genotypic ratio
The term that refers to the union of male and female gametes
zygote
fertilization
monohybrid cross
homologous
The first diploid cell produced when a male gamete fuses with a female gamete
fertilization
somatic cell
gametic cell
zygote
A cell that contains only one chromosome of each kind
diploid
haploid
gamete
somatic
The type of cell division that produces gametes
mitosis
meiosis
When the two alleles that make up a gene are the same
heterozygous
homozygous
hybrid
The term that describes the passing of characteristics from parents to offspring
alleles
heredity
homozygous
heterozygous
What is the genotypic ratio of the following genetic cross?
2:2
1:2:1
3:1
1:0
What is the significance of Mendel’s law of Independent assortment?
The significance is that genes get sorted into gametes independently of one another
The significance is that the allele a gamete receives for one gene does not influence the allele received for another gene
The significance is that it produces
genetically diverse gametes and this creates diversity
The significance is that it determines which alleles are passed to offspring and which alleles are not
Organisms that reproduce sexually receive what percentage of their genes from each parent?
10%
25%
50%
100%
Which of the following is a phenotype?
Aa
red hair
heterozygous
DNA
Dominant alleles are represented by a:
Male gene
lowercase letter
recessive trait
capital letter
T - tall and t = short
In the Punnett square below, what belongs in the missing square
tt
Tt
Bb
TT
G = green, g = yellow
The genotype for a yellow plant is...
GG
Gg
gg
yy
What allele combination should go in the missing box?
AA
Aa
aa
If B = brown hair and b = blonde hair, what is the probability of brown hair?
25%
50%
0%
75%
Black hair color is dominant to white hair color in mice. Determine the phenotypic ratio for the offspring of a heterozygous black mouse and a white mouse.
4 Black: 0 White
3 Black: 1 White
2 Black: 2 White
0 Black: 4 White
In certain species of plants, purple flowers (P) are dominant to white flowers (p). If two heterozygous plants are crossed, what will be the phenotype of the offspring?
100% purple flowers
100% white flowers
75% white flowers, 25% purple flowers
25% white flowers, 75% purple flowers
What is the dominant trait here?
Bb
Recessive eyes
Blue eyes
Brown eyes
This is an example of ___________?
Incomplete dominance
Codominance
Multiple Alleles
Polygenic Inheritance
This is an example of ___________.
Incomplete Dominance
Codominance
Multiple Alleles
Polygenic Inheritance
Many genes determine 1 trait (ex: skin color)
Incomplete Dominance
Polygenic
Codominance
Multiple alleles
If two parents are heterozygous for type A blood, what is the probability that their offspring would have type O blood?
100 %
75%
50%
25%
If a father is AA and a mother is AB, what is the probability for a child with AB blood?
0%
25%
50%
75%
The sex of a child is determined by
whether the father's sperm contains an x or y chromosome
whether the mother's egg contains an x or y chromosome
the age of the parents
Hemophilia is a recessive x-linked disorder.
(XH= no hemophilia Xh=hemophilia)
Which genotype represents a female who is a carrier for hemophilia?
XHXh
XhXh
XHXH
XhY
Which of the following genotypes belongs in the red box in the Punnett square?
XBXb
XbXb
XbY
XBY
