NEW
Font size
WorksheetsExploring Complex Genetics Concepts
Total questions: 20
Worksheet time: 22mins
Which type of mutation results in a change in a single nucleotide base in DNA?
Frameshift mutation
Point mutation
Chromosomal mutation
Duplication mutation
In codominance, if a person inherits an allele for type A blood from one parent and an allele for type B blood from the other, what is their blood type?
Type A
Type B
Type AB
Type O
Which of the following is an example of incomplete dominance?
A red flower crossed with a white flower produces pink flowers
A person with type AB blood
A person with sickle cell anemia
A person with type O blood
Which genotype would result in type O blood?
IAIA
IAIB
IBIB
ii
What is epistasis?
When one gene masks or modifies the effect of another gene
When both alleles are fully expressed in the phenotype
When a gene is deleted from the chromosome
When a gene is duplicated
Which of the following is a genetic disorder in which blood cells are misshaped and cause blood clots?
Down syndrome
Sickle cell anemia
Turner syndrome
Klinefelter syndrome
If a person with genotype IAi marries a person with genotype IBi , what is the probability that their child will have type O blood?
0%
25%
50%
75%
Which of the following best describes codominance?
One allele is completely dominant over the other
Both alleles are expressed equally in the phenotype
The phenotype is a blend of both alleles
Neither allele is expressed
Which of the following is an example of epistasis in animals?
Labrador retriever coat color, where one gene determines pigment and another gene determines whether pigment is deposited
Human blood types
Sickle cell anemia
Cystic fibrosis
A mutation that results in a premature stop codon is called a:
Missense mutation
Nonsense mutation
Silent mutation
Frameshift mutation
Which blood type is considered the universal donor?
Type A
Type B
Type AB
Type O
In incomplete dominance, what would be the expected phenotype ratio in the offspring of two heterozygous parents ( Rr×Rr ) where R is red and r is white?
1 red : 2 pink : 1 white
3 red : 1 white
1 red : 1 white
2 red : 2 white
Which of the following statements about gene expression is true?
All genes are expressed at all times in every cell
Gene expression can be turned on or off depending on the cell’s needs
Only dominant genes are expressed
Gene expression is not regulated
Which of the following is NOT a possible human blood type?
Type A
Type B
Type AB
Type C
A person with genotype IAIA has which blood type?
Type A
Type B
Type AB
Type O
Which of the following best describes a frameshift mutation?
A mutation that changes one amino acid to another
A mutation that does not change the amino acid sequence
A mutation caused by insertion or deletion of a nucleotide, altering the reading frame
A mutation that results in a stop codon
Which of the following is an example of codominance in humans?
Sickle cell trait
Blood type AB
Cystic fibrosis
Albinism
Which of the following is true about genetic disorders?
All genetic disorders are inherited in a dominant manner
Some genetic disorders are caused by mutations in a single gene, while others involve multiple genes or chromosomes
Genetic disorders cannot be caused by mutations
All genetic disorders are curable
In a dihybrid cross between two individuals who are heterozygous for both traits, the typical phenotypic ratio is?
9:3:3:1
12:3:1
1:2:1
3:1
A micrograph in which pairs of homologous chromosomes are arranged in decreasing size is called a?
prokaryote
eukaryote
karyotype
pedigree
