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WorksheetsGenetic inheritance
Total questions: 35
Worksheet time: 26mins
The trait that will always be expressed if at least one copy of an allele is present.
Recessive
Dominant
DNA
The trait that will be expressed only if two copies of the allele are present.
Recessive
Dominant
DNA
What is it called when a gene carries two different types of alleles?
Homozygous
Heterozygous
Monozygous
Trizygous
What is it called when a gene carries two of the same alleles?
Homozygous
Heterozygous
Monozygous
Mamazygous
Which of the following is heterozygous?
FF
Gg
tt
RR
Which of the following is homozygous recessive?
rr
TT
AA
Ff
Brown eye color is dominant. Blue eye color is recessive. Select the combination of letters below that would represent a person being a purebred for brown eyes. In other words, which option represents a person having both alleles for brown eyes? (hint: think of capitalization of letters and what is used for dominant vs. recessive).
AA
Aa
aa
aA
Brown eye color is dominant. Blue eye color is recessive. Select the person that is a purebred for blue eyes.
AA
Aa
aA
aa
What is the definition of the phenotype?
The physical traits of an organism
The genetic makeup of an organism
The letters eg, Aa
How the genotype is expressed.
If mom has type AB blood and dad has type B blood, can the baby have type O blood?
Yes
No
Two parents are carriers of a genetic disease. This means they are ____.
homozygous
homozygous dominant
homozygous recessive
heterozygous
When phenotypes are determined by a continuum of additive affects.
polygenic inheritance
codominance
epistasis
pleiotropy
What is the phenotypic ratio in the F1 generation of a dihybrid testcross?
3: 1
1:2:1
9:3:3:1
1:1:1:1
Mating an individual expressing a dominant phenotype but those genotype is unknown with an individual expressing the corresponding recessive phenotype is an example of
a heterozygous cross.
an F1 cross.
a self cross.
a test cross
Which of the following represents the possible genotypes resulting from a cross between an individual heterozygous (Bb) and one that is homozygous (bb)?
BB and Bb
Bb and bb
BB only
Bb only
What is a gene?
Long strands of DNA that contain lots of genes.
Different versions of a gene.
The basic unit of heredity; controls a specific trait.
A characteristic passed from parent to offspring
The differences that occur from a mixture of genes
Based on the diagram, determine the genotype of the parent plants
Tt x Tt
Tt x tt
TT x tt
TT x Tt
Mendel's First Law is...
The law of independent Assortment
The law of segregation
The two alleles for a heritable character separate into different gamete. This is a statement of which Mendelian's law?
Mendel's first law
Mendel's second law
A bubble guppy with a yellow tail has offspring with a bubble guppy with a red tail. The offspring have orange tails. What is this an example of?
Codominance
Incomplete Dominance
Multiple Alleles
Polygenic Triats
There are many different alleles for fur color in cats. What is this an example of?
Codominance
Incomplete Dominance
Multiple Alleles
Polygenic Traits
Hemophilia is a sex-linked trait. Are males or females more likely to exhibit this trait?
Males
Females
Females cannot have hemophilia.
Males cannot have hemophilia.
Situations in which one allele for a gene is not completely over another allele for that gene are called
Multiple alleles
Incomplete dominance
Polygenetic traits
Multiple alleles
A cross of a black chicken (BB) with a white chicken (WW) produces all black and white offspring (BW). This type of inheritance is known as:
Incomplete dominance
Polygenetic inheritance
Codominance
Multiple alleles
Variation in human skin color is an example of
Incomplete dominance
Codominance
Polygenetic traits
Multiple alleles
Why is color-blindness more common in males than in females?
Because females would have to receive one copy of the recessive color blindness gene to actually express the trait
Because a male only needs to receive the recessive gene from his mother to be color-blind
Because color-blindness is an Y-linked trait
Females are hemizygous
A true-breed red flowered snapdragon is crossed with a true-breed white flowered one. All of the F1 have pink flowers. What does this say about the parents traits?
Alleles for red and white flower are codominant
Allele for white flower is dominant
Allele for red flower is dominant
Allele for red flower shows incomplete dominance
What type of non-mendelian inheritance does the picture show?
codominance
sex-linked genes
multiple alleles
linked genes
Mama Isabella has a blood type of O. Her son, Norman, has also a blood type of O. What is the blood type of Norman's father?
A
AB
B
O
Which is Purebred?
