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WorksheetsGenetics Introduction Practice
Total questions: 40
Worksheet time: 40mins
Two identical alleles for a trait is known as
homozygous
heterozygous
mutation
codominance
A physical appearance is
genotype
heterozygous
phenotype
codominance
What does Pp mean?
two dominant alleles
heterozygous alleles
one dominant allele
two dominant and recessive alleles
Who studied different characteristics of pea plants by cross-pollinating plants?
Gregor Mendel
Albert Punnett
Sir Isaac Newton
David Kuster
Genotype is
stem height
feather color
physical appearance
genetic makeup
The term that relates to physical characteristics that are studied in genetics.
traits
offspring
generations
hybrids
Factors that control traits are
purebreds
genes
recessives
parents
Scientists call an organism with two different alleles for a trait
factor
purebred
trait
hybrid
A mutation is
any change that is harmful
any change in a gene or chromosome
any change that is helpful
any change in the phenotype
An organisms's allele combination is known as
phenotype
mutation
hybrid
genotype
What does RR mean
two dominant alleles
heterozygous alleles
at least one dominant allele
one dominant and one recessive allele
Which term describes the different forms of a gene
Chromosome
Allele
DNA
Punnett Squares
Aa, DD, Bb, yy are all examples of _______
genotypes
phenotypes
If something is heterozygous, it is also _____
purebred
hybrid
dominant
recessive
If something is homozygous, it can also be called____
phenotype
genotype
hybrid
purebred
Where is the majority of DNA stored within a cell?
Chloroplast
Cell wall
Cell membrane
Nucleus
Which statement is true?
Your DNA is identical to your siblings.
Your DNA is identical to your father's.
Your DNA is identical to your mother's.
Your DNA is unique to you.
A person who breeds animals keeps careful records of the fur color of parents and offspring from each generation. The fur color is a trait transferred from generation to generation.
What are the structures that carry the information for these traits called?
organelles
genes
muscles
cytoplasm
A characteristic passed from parents to their offspring is called a __________________ trait.
acquired
inherited
dominant
recessive
Grey (G) fur is dominant to brown (g) fur in mice. What would be the genotype of a mouse that is homozygous dominant?
GG
Gg
gg
GGG
Grey (G) fur is dominant to brown (g) fur in mice. What would be the genotype of a mouse that is heterozygous?
GG
Gg
gg
GGG
What is AA
Homozygous Dominant
Heterozygous
Homozygous Recessive
Heterozygous dominant
What is Aa
Homozygous Dominant
Heterozygous
Homozygous Recessive
Heterozygous dominant
What is aa
Homozygous Dominant
Heterozygous
Homozygous Recessive
Heterozygous dominant
The genetic makeup of an organism. Example BB
genotype
phenotype
Dominant
Recessive
The physical look or the organism, such as brown eyes
genotype
phenotype
Dominant
Recessive
The genotype for a yellow plant is...
What is a genotype?
Pair of alleles that determine a specific trait
Observable physical trait
A trait that is observed with only one copy of an allele
What is an allele?
A trait
Different forms of a gene
DNA
Different types of parents
What is a trait?
A physical characteristic passed down from your mom
A behavioral characteristic passed down from your dad
A physical or behavioral characteristic passed down from your parents
A behavioral characteristic passed down by your mom
What is a phenotype?
Pair of alleles that determine a trait
Observable physical trait
Different forms of a gene
What is a dominant gene?
A trait that is observed when there are one OR two copies of the allele
A trait that is observed only when there are two copies of the allele
A trait that can be hidden in a generation
A person who is homozygous for a trait can have a genotype of....
AA, Aa
Aa, aa
AA, aa
aa
If a person is heterozygous for a trait, their genotype can be...
Aa
AA, aa
AA, Aa
AA
If "B" represents brown hair, and "b" represents blond hair, what will the genotype be for a homozygous brown haired person?
BB
Bb
bb
If "B" is brown and "b" is blond, what is the phenotype of someone who's genotype is "bb"
Brown Hair
Blond Hair
Red Hair
How many copies of the recessive gene must there be for that phenotype to show up?
1
2
3
4
