WorksheetsFull Genetics Review
Total questions: 34
Worksheet time: 31mins
Identify the following genotype: TT
(a)
What is the probability of a homozygous recessive offspring in this cross?
(don't forget the %)
(a)
If long hair is a dominant trait in guinea pigs. Choose the BEST statement.
This guinea pig received two dominant traits. (HH)
This guinea pig cannot have a recessive allele. (h)
This guinea pig could be homozygous dominant (HH) or heterozygous (Hh)
This guinea pig is homozygous recessive (hh)
The dominant phenotype in this punnett square is (a)
Allele
variation of a gene
Homozygous
Recessive
hh
Heterozygous
Hh
Homozygous
Dominant
HH
Genotype
allele combination
Suppose a person is a carrier for a genetic disorder. Which of the following phrases about this person is true?
does not have the disorder but can pass it on
will develop the disorder only late in life.
cannot pass the disorder to sons, just daughters
the allele is not passed on due to the Y chromosome inactivation
What nitrogen bases can be found in every living organism?
Adenine
Thymine
Guanine
Cytosine
What type of dominance is being expressed in the image?
(a)
What is the probability of a homozygous dominant offspring with the following parental cross?
Hh x hh
(don't forget the %)
(a)
Which offspring genotype is not possible from the following parental cross?
Rr x RR?
(a)
What are the four gametes possible from the following parental genotype?
AaRr
F (1,3) - (a)
O (1,4) - (b)
I (2,3) - (c)
L (2,4) - (d)
Which two offspring genotype are not possible from the following parental cross?
AaRr X AArr
aarr
Which is the only possible genotype for an individual if they have a Type O blood type?
(a)
Which sex chromosome group determines the sex of an offspring? (a)
The process of meiosis creates new combinations of genetic material in each of the four gamete cells. These new combinations result from the exchange of DNA between paired chromosomes in a process called crossing-over. This process creates (a) in each gamete.
Can males be carriers for recessive traits on the X chromosome?
(a)
An individual with the AO genotype and an individual with the BO genotype can produce offspring with which of the following phenotypes?
Type
A
Type
O
Type
AB
Type
B
In humans, the gene for color blindness (c) is recessive. This gene is located on the X chromosome.
A man who is colorblind has a child with a woman who is a carrier for color blindness. What is the probability, as a percentage, that a male child will be colorblind?
(a)
The cross is a case of incomplete inheritance that involves alleles that were not clearly dominant or recessive and could make red, pink, and white-flowered plants.
What is the expected number of white-flowered plants if two pink (RW) flowers are crossed.
(a)
Hemophelia is a sex-linked recessive disease.
A woman who is heterozygous (a carrier) for hemophilia marries a man who does not carry the gene for hemophilia.
Which of the following will be true?
Half of their children of either sex may receive the gene for hemophilia.
All of their daughters will be carriers of hemophilia.
All of their sons will be hemophiliac.
If a defective gene occurs on the X-chromosome, it will normally be transmitted to male offspring only by the
(a)
Identify the following genotype: Tt
(a)
What is the probability of a male offspring inheriting a recessive trait if the mother is a carrier (XHXh) and the father is not affected?
(don't forget the %)
(a)
Which genotype is a carrier?
XGXG
XGY
XGXg
XgY
If a colorblind woman has children with a normal vision man, what is the probability of having male children who are colorblind?
Normal vision is dominant to colorblindness.
(a)
The law of independent assortment states that the inheritance of alleles for one trait is not affected by the inheritance of alleles for a different trait if the genes for the traits are on __________________.
same chromosomes
separate chromosomes
homologous chromosomes
homozygous chromosomes
In cocker spaniels the allele for a black coat color (B) is dominant over the allele for a brown coat color (b).If a heterozygous cocker spaniel is crossed with a heterozygous black cocker spaniel, which of the following genotypic ratios can be expected?
2 BB: 0 Bb: 2 bb
1 BB: 2 Bb: 1 bb
0 BB: 2 Bb: 2 bb
2 BB: 1 Bb: 0 bb
In parrots, green feathers is dominant over blue feathers. If a parrot breeder breeds a homozygous for blue feathers to a homozygous for blue feathers, how many of the 6 eggs laid will have blue feathers?
6
3
0
4
What percent of offspring are identified as carriers of a recessive disease in this cross?
(a)
What is the probability of male offspring being affected by a recessive disease?
(a)
SELECT ALL THAT APPLY: Which of the following could describe or identify incomplete dominance?
a 3rd phenotype is produced
The dominant allele is not completely dominant
Assume that these kittens are twins. Why is their phenotype different?
They have different amounts of chromosomes
One has more DNA than the other
The sequence of nucleotides is similar, but not exactly alike
They each experienced a genetic mutation
