WorksheetsIntro To Genetics
Total questions: 25
Worksheet time: 8mins
Different forms of genes are called
traits
alleles
monohybrid crosses
gametes
The physical appearance of an organism is called its
Assortment
Genotype
Phenotype
Recessive
If two alleles are the same, they are said to be
Dominant
Homozygous
Heterozygous
Recessive
If one form of a gene can overpower or mask another form, it is
Dominant
Recessive
Homozygous
Heterozygous
Mendel’s law of segregation states that the two alleles for a given trait:
Combine during meiosis (gamete formation)
Separate at meiosis
Are eliminated during meiosi
Are tripled during meiosis
A trait controlled by four alleles is said to have
homologous alleles
hybridization
autosomes
multiple alleles
Eggs and sperm are both examples of ____________.
Alleles
Gametes
Offspring
Monohybrid Cross
A monohybrid cross can be best described as
breeding among plants
a cross among one pair of contrasting traits.
a cross among two pairs of contrasting traits.
a cross to test if an individual carries one or two dominant alleles.
The genetic makeup of an individual is its ___________________.
Genotype
Phenotype
Dominance
allelic frequency.
Alleles of different genes separate independently of one another during gamete formation is best described as:
Mendel’s law of independent assortment.
Mendel’s law of allelic frequency.
Mendel’s law of segregation.
all of the above.
The parental generation of Mendel’s experiments was always _____ for a trait
Self-fertilized
True-Bred
Dominant
Recessive
The blood types A, B, AB, and O are the result of ___________ inheritance.
multiple alleles
Sex-linked
Simple Dominance
Polygenic Inheritance
Human blood types are genetically determined. A male and a female both have blood type AB. If they have a child, what is the probability that child will also have blood type AB?
25%
50%
75%
100%
The pedigree below shows the occurrence of Becker muscular dystrophy in a family. Becker muscular dystrophy causes muscle weakness. Based on this pedigree, it is most reasonable to conclude that Becker muscular dystrophy is which of the following?
Codominant trait
an autosomal dominant trait
polygenic trait
sex-linked trait
The diagram below shows the positions of the genes for flower color and stem length in a pea plant. The chromosomes represented below will replicate before meiosis.
For these two genes, what is the maximum number of different allele combinations that can be formed normally in gametes produced from this cell?
1
2
3
4
determine the pattern of inheritance:
Skin color in humans is controlled by six different genes, an example of a genotype for human skin color would be: aaBbccDDEeFf, or AabbCcddEEFF.
incomplete dominance
codominance
polygenic trait
X-linked trait
Determine the Pattern of inheritance:
A red carnation and a yellow carnation cross-fertilize and produce six peach-colored carnations.
Incomplete Dominance
Codominance
X-linked Traits
Polygenic Traits
Determine the Pattern of Inheritance
A woman who is a carrier for Duschene’s Muscular dystrophy passes the disorder onto one of her sons.
Codominance
Incomplete Dominance
X-Linked trait
Polygenetic Trait
Determine the Pattern of inheritance
Certain breeds of chickens can be black-feathered, white-feathered, or checkered-feathered.
Codominance
Incomplete Dominance
X-Linked
Ploygenetic Traits
Because the gene for red-green colorblindness is located on the X chromosome, it is not possible for
a carrier mother to pass the gene on to daughter.
a carrier mother to pass the gene on to her son
a colorblind father to pass the gene onto his daughter.
a colorblind father to pass the gene onto his son
What is the probable mode of inheritance for the trait shown in the pedigree above?
autosomal dominant
autosomal recessive
codominant
polygenic
Based on the pedigree above, what can you infer about II-2’s parents?
they are both carriers of the trait
they are both homozygous dominant
they are both homozygous recessive
What relation is I-2 to III-3?
Grandfather
Grandmother
Great Grandmother
Aunt
What are the chances that individual III-2 is a carrier for this trait?
25%
50%
75%
100%
A woman is a carrier for hemophilia. She marries a normal male. They have a son. What is the chance that he will have hemophilia?
25%
50%
75%
100%
