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WorksheetsUnit 6 Review
Total questions: 53
Worksheet time: 27mins
In humans, C is the allele for those who have curly hair and c is the allele for those with straight hair. Two sisters have curly hair but one of them has both C and c alleles while the other is homozygous dominant. Which statement is true about the sisters?
They have the same genotypes and phenotypes
They have different genotypes but the same phenotype
They are not blood related
They have different genotypes and phenotypes
Female cattle that have white coats are crossed with male cattle who have red coats. Their offspring are roan (red and white). What can be said about the genetics of the coat color?
it is sex linked
it is recessive
it is incompletely dominant
it is codominant
Fruit flies have hair like bristles on the backside of their bodies. The bristles can be long or short. Flies with short bristles have two recessive alleles (ss) for the trait. A fruit fly that is heterozygous for long bristles is crossed with a fruit fly that has short bristles. What percentage of the offspring are expected to have short bristles?
0%
100%
23%
50%
Leah has blue eyes (recessive) while both of her parents have brown eyes (dominant). Which of the following statements are true?
she is not their daughter
Leah inherited both genes from her father
Leah inherited the recessive allele from both parents
Leah only inherited the dominant allele from both parents
Hibiscus flowers can be white or purple. A hibiscus with white flowers is crossed with a hibiscus with purple flowers. All of the offspring have purple flowers. Based on the results of the cross, which of the following statements most likely describes the alleles for flower color?
white is dominant over purple
blue and red flowers made the purple flower
purple is dominant over white
they are codominant together
In dogs, having short fur is dominant over having long fur. If a homozygous dominant dog crosses with a dog with long fur, how many different phenotypes are possible for their offspring?
1
2
3
4
In Andalusian chickens, feather color is inherited by incomplete dominance. If one parent with black feathers is crossed with a white feathered parent, all offspring will have heterozygous blue feathers. What is the percent chance of producing blue-feathered offspring when crossing a blue-feathered hen with a white feathered rooster?
55%
34%
75%
50%
Which of the following is an example of codominance?
A tall person and a short person have a child who is medium in height
A black and tan coonhound
An orange cat and a white cat having a cream colored cat
A black cow and a white cow having all black offspring
Why do siblings often look alike?
they get half of their genetic material from each parent
they are clones
Siblings never look alike
the cells of the siblings contain all the dominant traits from their parents
You work for a florist and they ask you to cross red flowers with white flowers to make more red flowers. When you do that, the offspring are pink instead of red. What is this an example of?
recessive alleles
colorblindness
incomplete dominance
codominance
If you cross a red (RR) flower with a white (WW) flower, what percent of the offspring will be pink?
4%
25%
75%
100%
Huntington's disease is a genetic disorder in humans which is controlled by a dominant gene. If one parent is heterozygous for the trait and the other does not have Huntington's, what are their chances of having an offspring with the disease?
25%
100%
50%
60%
In hamsters, the allele for black hair (B) is dominant to the allele for brown hair (b). Two black-haired hamsters are crossed. One of the hamsters is homozygous for black hair and one is heterozygous. What percentage of the offspring are expected to have black hair?
0%
25%
80%
100%
Which of the following genotypes is homozygous dominant?
Aa
aa
AA
none of these options are homozygous dominant
What does the prefix homo mean?
different
the same
What does the prefix hetero mean?
different
the same
hh would result in a ___________?
dominant phenotype
recessive phenotype
codominance
incomplete dominance
How an organism physically looks is called ____________.
genotype
phenotype
Genes are:
what you wear on your legs
segments of DNA that code for proteins
another word for nucleus
enzymes
A dog's phenotype can be determined by:
looking at the karyotype
looking at the dog
looking at what the parents look like
taking a DNA sample
What is the genotype of a heterozygous green pod?
Tt
Yy
RR
Gg
What is the genotype of a homozygous round seed?
TT
GG
YY
RR
What is the genotype of a short plant?
rr
ss
tt
yy
What is the phenotype of a yy seed color?
green
yellow
wrinkled
there is no such thing as a phenotype
Mr. and Mrs. Jones have six children. Three of them have attached earlobes (recessive) like their father, and the other three have free earlobes like their mother. What are the genotypes of Mr. and Mrs. Jones? (F = free earlobes, f = attached)
Ff and ff
Ff and Ff
FF and Ff
ff and ff
Gray Dobermans are recessive to the black and tan Dobermans. A breeder looks at her new litter of puppies and notices that there are 5 black and tan puppies and 1 gray puppy. What are the genotypes of the parents?
Homozygous dominant
Homozygous recessive
heterozygous
a breeding mistake
A parent with Type A blood and a parent with Type O blood have a child. Which of the following is a possible genotype of their offspring?
I^A I^A
I^A I^B
I^B i
I^A i
As twins get older, they often do not look very similar/act very similar. What could cause this?
Because the environment plays a role in influencing individuals
your DNA changes as you get older
they were never twins to begin with
they grew apart
Which of the following best describes why males cannot be carriers of sex-linked traits?
Males are always the carriers
Males cannot be carriers because they only inherit one X chromosome, either having the trait or not
Males cannot be carriers because their mothers pass on an X chromosome without the sex-linked trait
Males cannot be carriers because their Y chromosome makes them immune to sex- linked traits
What abnormality does this person have?
Trisomy 2: Biology Syndrome
XXY: Klinefelters
Trisomy 21: Down syndrome
X: Turners syndrome
What abnormality does this person have?
female: Turners
Female: Klinefelters
Female: Huntingtons Disease
Female: no abnormality
The Himalayan rabbit’s habitat has cold, snowy winters and mild summers. The body is typically covered in white fur except for the nose, feet, tail, and ears, which are covered in black fur. A scientist shaved an area of white fur on the back of a Himalayan rabbit and placed an ice pack over the shaved area. The shaved area grew black fur. Which best explains why the fur grew back black?
The white hair mutated to black hair as the rabbit’s body temperature decreased.
The coat color changed from white to black with the age of the rabbit.
White hair only grows during certain times of the year.
The genes for black hair were activated by specific temperatures.
Human eye, skin, and hair color are all:
dominant
polygenic genes (multiple alleles)
sex linked
they are all on the Y chromosome
Identical twins were separated at birth. They found out and met up 25 years later. The twins were different in height and weight. What could be an explanation for this?
One twin had a genetic condition that prevented her from growing tall.
Their DNA is not indentical
Each twin had a different lifestyle (different diet, exercise etc)
They were never twins to begin with
A mother has type A blood and her husband has type B blood. Their child has type O blood, much to their surprise. Could this child be theirs?
no the hospital messed up
yes if both parents were heterozygous (AO and BO)
no, there is no such thing as type O blood
yes both parents are recessive
Those who are shaded in have hitchhikers thumb. Who are the 2 individuals who have the trait?
III-2 and I-1
II-2 and III-5
II-2 and II-3
no one has the trait
Is this trait dominant or recessive and why?
Dominant; there are a lot of people shaded in
Recessive; not a lot of people are shaded in
Karyotypes show:
genetic diseases
homologous chromosomes
the phenotype of someone
mutations
What generation is indicated by the arrow?
I
II
III
IV
In humans, the allele for straight thumbs (T) is dominant to the allele for bent thumbs (t). A Pedigree showing the inheritance of thumb type is shown: What are the genotypes of individuals 4 and 5?
TT and TT
tt and tt
Tt and Tt
Tt and tt
Convert this DNA strand to RNA: ATCGGTATCCAT
UAGCCAUAGGUA
TAGCCATAGGTA
AUGCCUTUGGTU
What are the 3 amino acids coded for by this: AGU CCC UAG?
Met-Ser-Stop
Leu-met-pro
Gln-Gly-Stop
Ser-Pro-Stop
What type of RNA is this?
mRNA
rRNA
tRNA
this is DNA
What is the function of mRNA?
to make DNA
to create more ribosomes
to transport information from the nucleus to the ribosome
to transport proteins to the nucleus
What is this?
DNA strand
mRNA strand
codon chart
a protein chart
How many codons are in this sequence? (ATGCCATATGGCTAC)
8
3
5
there are no codons here
Why do we need DNA replication before the cells divide?
so that there is enough cell membrane for everyone
so that the new cells have the correct amount of DNA
the DNA does not replicate during cell division
DNA replication happens after cell division
What mutation occurred here? (ATC CAT GGG ----> ATG CAT GGG)
point mutation
deletion
addition
frameshift
What blood type is this: I^A I^B?
A
B
AB
O
What blood type is this: I^Ai
A
B
AB
O
What blood type is this: ii
A
B
AB
O
What blood type is this: I^BI^B
A
B
AB
O
What is the genotype of someone who has type BO blood?
I^AI^A
I^BI^O
I^Bi
there is no such type
