WorksheetsGenetics Review
Total questions: 52
Worksheet time: 26mins
The passing of traits from parent to child is known as _______________.
heredity
gene
DNA
RNA
This trait is represented by a lower case letter and hidden whenever the dominant allele is present
dominant allele
codominace
recessive allele
Punnett Square
This trait is represented by a capital letter and always shows up in an organism when the allele is present
dominant allele
codominance
probability
recessive allele
Which of the following is homozygous recessive?
RR
Rr
rR
rr
Which genotypes are heterozygous?
EE
tt
Rr
both EE and tt
Which genotypes are homozygous dominant?
EE
tt
Rr
both EE and tt
Which genotypes are homozygous?
EE
tt
Rr
Both EE and tt
_____ is the genetic makeup of an organism.
phenotype
genotype
A ____ is a region of DNA that controls a trait.
gene
phenotype
chromatin
genotype
he ____ is the physical appearance of an organism.
genotype
phenotype
Q.
Genotype refers to the ...
physical expression of the genes
the possible combination of alleles in a gene
whether an allele is dominant or recessive
how an organism will appear
Having two of the same genes for the trait (sometimes called purebred).
homozygous
heterozygous
protein
chromosome
having two different genes for a trait (sometimes called hybrid).
protein
homozygous
heterozygous
genotype
G = green, g = yellow The genotype for a yellow plant is...
GG
Gg
gg
all choices result in yellow
Where, in the eukaryotic cell, is DNA located?
ribosomes
nucleus
E.R.
cytoplasm
Sex cells are produced through the process of
mitosis
cytokinesis
binary fission
meiosis
What does heterozygous mean?
An organism that has the same genes for a trait (TT or tt)
An organism that has different genes for a trait (Tt)
When neither gene is fully dominant; offspring is a mixture of both
the different forms of a trait (hair color--> brown, blonde, red
Which of the following is homozygous dominant?
Yy
Y
yy
YY
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
DNA
protein
RNA
glucose nucleic acid (GNA)
shows even if only one parent passes on the gene
recessive
dominant
codominant
"T" is dominant, "t" is recessive. If an organism has the genes "Tt."
Which will trait will result?
"T" dominant
"t" recessive
"G" is dominant, "g" is recessive. If an organism has the genes "gg."
Which will trait will result?
"G" dominant
"g" recessive
Emily has brown hair.
Which most likely explains why Emily has brown hair?
Emily's favourite colour is brown
Emily has a parent with brown hair
Emily's older brother has brown hair
What should you use to predict the traits of offspring when you know the genes of two parents?
a graph
a flow chart
a data table
a Punnett square
Which statement best supports why many offspring look similar to their parents?
Offspring inherit traits from only one parent.
Offspring inherit traits from both parents.
Parents choose which traits to pass on to their offspring.
What is the probability of bb offspring?
1/4
2/4
0/4
4/4
What allele combination should go in the missing box?
AA
Aa
aa
none of these
In a certain species of plant, the color purple (P) is dominant to the color white (p). According to the Punnett Square, what is the probability of an offspring being purple?
25%
0%
100%
50%
In a certain species of plant, the color purple (P) is dominant to the color white (p). According to the Punnett Square, what is the probability of an offspring being white?
25%
0%
100%
50%
Is it possible for a visible trait to skip a generation? Example: Blue eyes
Yes
No
T - tall and t = short In the punnett square below, what belongs in the missing square
tt
Tt
Bb
TT
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
0%
25%
50%
75%
In the punnett square shown, what must the genotype of the missing parent be?
BB
Bb
bb
Tt
In the punnett square shown, what is the genotypes of the two parents?
RW and RR
RW and WW
RR and WW
RW and RR
Which of the following is a phenotype?
Aa
black hair
heterozygous genes
mutated DNA
This image shows a...
Punnett square
Phenotype
Genotype
Dominant Allele
What is the probability of heterozygous offspring?
25%
50%
0%
100%
What allele combination should go in the missing box?
AA
Aa
aa
none of these
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
25%
1%
1%
0%
Which of the following genotypes are purebred?
Pf
Pp
PP
pP
Which of these is homozygous recessive?
Rr
rR
RR
rr
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
An individual's sex is determined by
1 of 23 chromosomes
2 of 46 chromosomes
4 of 92 chromosomes
2 of 23 chromosomes
Why is the gene for a disease or disorder more likely to be found on the X chromosome than Y?
The X chromosome has many more genes
The Y chromosome has many more genes
Males are more likely to suffer from a sex-linked disease or disorder because
males are the weaker sex
males have less DNA
males have 1 X chromosome, so the disorder is more likely to be expressed.
When we say that a woman is a carrier for a genetic disease or disorder it means that
She has 1 gene, but not the disorder
she has 2 genes for the disorder
she can pass the gene only to male children
she can pass the gene only to female children
Why are men 16 times more likely to be color-blind than women?
to be color-blind, you must have a Y chromosome
to be color-blind, all of your X chromosomes must have the gene
color-blindness is caused by testosterone
color-blindness is caused by the same gene as baldness
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be
sex-linked trait
polygenic trait
codominant trait
incomplete dominant triat
Hemophilia is a recessive x-linked disorder. Which genotype represents a female who is a carrier for hemophilia?
XHXh
XhXh
XHXH
XhY
Hemophilia is a recessive x-linked disorder. Which genotype represents a male with hemophilia?
XHXh
XhXh
XHY
XhY
Which is an example of codominance?
left
right
Which is an example of incomplete dominance?
left
right
