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WorksheetsUnit 5 Heredity Test Version A
Total questions: 56
Worksheet time: 1hrs 4mins
Which of the following genotypes is homozygous dominant?
aa
Aa
AA
Aa, DD, Ba, and yy are all examples of ---
genotypes
phenotypes
Brown eyes are dominant (B) over blue eyes (b). What is the probability that the offspring will have brown. Complete the Punnett square.
1
2
3
4
What type of inheritance does this pedigree represent
Autosomal dominant
atutosomal recessive
sex linked dominant
sex linked recessive
y-linked
The genotype of Individual II-1
homozygous dominant
recessive
heterozygous
Can't tell
What type of inheritance pattern is shown in the pedigree to the left?
autosomal dominant
Autosomal recessive
sex-linked
y linked
How do you show an affected person on a pedigree?
blank shape
half-shaded shape
solid shape
striped shape
How do you show an unaffected person on a pedigree?
blank shape
half-shaded shape
solid shape
striped shape
How many children did the couple in the first generation have?
3
5
4
7
What type of mutation is shown?
Duplication
Deletion
Inversion
Translocation
What type of mutation is shown?
Duplication
Deletion
Inversion
Translocation
What type of mutation is shown?
Duplication
Deletion
Inversion
Translocation
What type of mutation is shown?
Duplication
Deletion
Inversion
Translocation
What is the gender of this person?
Male
Female
On what chromosome number is the mutation?
21
18
7
All
Why are insertion and deletion (frameshift) mutations so harmful?
They change all of the codons from the mutation on down the line, which changes the amino acid sequence
They insert things that an organism doesn't need.
They often delete things that organisms need.
Insertion and deletions are not any more harmful than substitution mutations.
Failure of homologous chromosomes
to separate during meiosis.
Results in gametes with either one extra or one missing chromosome.
Translocation
Nondisjunction
Replication
Transcription
Individual I-2 has a genotype of
(use the letter a for the genotypes)
(a)
Write the genotype for each of the individuals marked
What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?
Ry
rrYy
RrYy
Rryy
Which Mendelian law is represented by the ratios seen in a monohybrid cross?
Law of Segregation
Law of Independent Assortment
Incomplete dominance
Heterozygous alleles
During meiosis and gamete formation, homologous (paired up) alleles split up
Phenotype
Law of Segregation
Genotype
Dihybrid Cross
The Italian monk/scientist who first showed
the principles of genetics
Watson and Crick
Linnaeus
Darwin
Mendel
What phenotypic ratio would you expect from a cross of 2 heterozygous offspring for a single trait?
1:0
3:1
1:2:1
4:0
In pea plants, flowers can either be pink (P, dominant) or white (p, recessive). If a pink flowered (PP) and a white flowered pea plant (pp) are crossed, what is the predicted phenotype of the offspring?
1 : 1 ratio of pink to white flowers
3 : 1 ratio of pink to white flowers
1 : 3 ratio of pink to white flowers
All pink flowers
In Holstein cattle the allele for black hair color (B) is dominant over the allele for red hair
color (b), and the allele for polled (P), or lacking horns, is dominant over the allele for having
horns (p).
What is the expected phenotypic ratio of the offspring of a BbPp × BbPp cross if these alleles
sort independently?
16 black/polled : 0 black/horned : 0 red/polled : 0 red/horned
12 black/polled : 0 black/horned : 0 red/polled : 4 red/horned
4 black/polled : 4 black/horned : 4 red/polled : 4 red/horned
9 black/polled : 3 black/horned : 3 red/polled : 1 red/horned
A cat with curled ears was crossed with a cat with non curled ears. All of the kittens born had non curled ears. Later when the offspring were crossed with each other, the phenotypic ration was 3 to 1 non-curled to curled ears. What conclusions can be made about curled ears?
curled ears are a result of crossing over
it is a dominant trait
It is a recessive trait
more crosses need to be done to determine how the trait is inherited.
A male beetle has the genotype TtBb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype Ttbb?
(put answer in simplest ratio)
(a)
A male alligator has the genotype RrAa. If this alligator mates with a female with genotype RrAa, what is the chance their offspring will have the genotype RRAA? [Type the answer in fraction]
(a)
In humans, hemophilia is a sex linked recessive trait. Females can be normal, carriers, or have the disease. Males will either have the disease or not (but they won’t ever be carriers). A woman who is a carrier marries a normal man. What is the probability that their daughter will have hemophilia?
0%
25%
50%
100%
When a heterozygote has the phenotypes of both homozygotes simultaneously
Codominance
Complete Dominance
Incomplete Dominance
When more than 2 alleles are present on a given locus
Codominance
Multiple Alleles
Nondisjunction
When alleles at one locus mask the effects of alleles at a different locus
Epistasis
Multiple Alleles
Codominance
Gene Interaction
A man with type ii blood marries a woman with type A blood. Which of the following blood types might their children inherit?
Type AB only
Type A or type O
Type A, type B, or type AB
type A or type AB
Type B or type O
In Andalusian fowls, black individuals (BB) and white individuals (WW) are homozygous. Heterozygous individuals are a bluish grey. What type of inheritance does this represent
incomplete dominance
codominance
sex-linked
autosomal dominant
polygenetic
Predict the probability of a child have the genotype AabbCCddEE if the parents are
AaBbCcDdEe x AaBbCCDdEe
(write as a fraction in the simplest form)
(a)
A breed of cow has one allele (B) that codes for brown hair and another allele (W) that codes for white hair. A heterozygous (BW) cow is a spotted brown and white pattern. What type of dominance is this?
Codominanace
Complete Dominance
Incomplete dominance
Coreccessive
Sex linked traits affect which biological sex more frequently?
Female
Both sexes equally
Male
Which genotype represents a female who is a carrier for hemophilia?
Black fur in mice (B) is dominant to brown fur (b). Short tails (T) are dominant to long tails (t). What percentage of the offspring of the cross BbTt x BBtt will have black fur and long tails?
0%
25%
50%
100%
two parents
AABBCC x aabbcc
what is the probability that their children will be recessive for anyone of the three traits
(write it as a percent)
(a)
two parents
AABBCC x aabbcc
what is the probability that their children will be heterozygous for all three traits?
(write it as a percent)
(a)
A cat with curled ears was crossed with a cat with non curled ears. All of the kittens born had non curled ears. Later when the offspring were crossed with each other, the phenotypic ration was 3 to 1 non-curled to curled ears. What conclusions can be made about the original parents?
Both parents were heterozygous
one parent was homozygous dominant and one parent was recessive
both parents were recessive
One parent was recessive and the other was heterozygous
both parents were homozygous dominant
