WorksheetsGenetics Exam
Total questions: 25
Worksheet time: 6hrs 15mins
A characteristic that can be observed such as hair color: Seed shape, flower color, etc.
genotype
trait
heredity
The genetic makeup of an organism
genotype
trait
heredity
The passing of characteristics from parent to offspring
genotype
trait
heredity
A gene choice that MASKS ANOTHER choice for a trait
recessive
true breeding
genetics
dominant
A gene choice that IS MASKED BY ANOTHER choice for a trait.
recessive
true breeding
genetics
dominant
The branch of biology that studies how characteristics are transmitted from parent to offspring.
recessive
true breeding
genetics
dominant
An organism that always produces offspring identical to itself if self-pollinated
recessive
true breeding
genetics
dominant
A device used to determine the probability that offspring will inherit a specific trait
Punnett Square
Heterozygous
Homozygous
Both alleles for a trait are the same
Punnett Square
Heterozygous
Homozygous
Alleles for a trait are different
Punnett Square
Heterozygous
Homozygous
Which of the following is true of Mendelian Inheritance?
If a dominant allele is present, the recessive allele won’t be seen
If a recessive allele is present, the dominant allele won’t be seen.
Both recessive and dominant alleles show if present
The Dominicker chicken’s feather color is genetically controlled. Feather color can be black, white, or black and white. This is an example of
incomplete dominance
simple inheritance
codominance
multiple alleles
The flower color of snapdragons is genetically controlled. Flower color can be red, white, or pink. This is an example of
incomplete dominance
simple inheritance
codominance
multiple alleles
The "father of genetics" is
Aristotle
Gregor Mendel
Isaac Newton
Charles Darwin
If an individual has two recessive alleles for the same trait, the individual is said to be
homozygous for the trait
haploid for the triat
heterozygous for the trait mutated
Tallness (T) is dominant to shortness (t) in pea plants. Which of the following represents a genotype of a pea plant that is heterozygous for tallness?
tall
TT
Tt
tt
In Mendel’s experiments with a single trait, the trait that disappeared in the first generation and reappeared in the next generation is called the
homozygous trait
heterozygous trait
recessive trait
dominant trait
The letters on the top and side of a Punnett square represent
the genotypes of the offspring
the alleles in the parents' gametes
the parents' phenotypes
none of the above
An allele can be best described as
a strand of replicated chromosome
the genetic make-up of an organism
the physical appearance of an organism
an alternate form of a gene
A cross of two individuals for a single contrasting trait is called
dominant
codominant
monohybrid
dihybrid
The diagram is called a
Punnett Square
Dihybrid Cross
Purebred Cross
Pedigree
In box (A), what percent of offspring show the dominant trait?
25%
50%
75%
100%
In box (B), what is the genotypic ratio of the offspring?
1:2:1
3:1
0:3:1
3:1:0
Which of the following is not true based on Box (C)?
A parent with type A blood can have a child with type B.
To have a child with type AB blood, one parent has to be type AB.
Type A and type B parents can have a child with type O blood.
A type A Dad and a type B Mom can have children with 4 different blood types.
In box (A), what is the phenotypic ratio of the offspring?
1:2:1
3:1
0:2:2
2:2
