WorksheetsHuman Genetics
Total questions: 25
Worksheet time: 1hrs 19mins
The diagram below represents the karyotype of a person with a genetic disorder.
Which is the likely cause of this condition? (3.2.2)
nondisjunction during mitosis
nondisjunction during meiosis
chromosomal deletion during mitosis
chromosomal deletion during meiosis
A human egg cell might contain (3.2.1)
22 autosomes and an X chromosome
22 autosomes and a Y chromosome
45 autosomes and an X chromosome
45 autosomes and a Y chromosome
Human males are much more likely to have hemophilia than human females. This is the case because: (3.2.2)
the gene for hemophilia is carried on the Y chromosome
hemophilia is carried on autosomes
the gene for hemophilia is sex-linked
hemophilia is a contagious disease to which males are more susceptible
What type of inheritance is shown in the pedigree below? (3.2.2)
autosomal dominance
codominance
incomplete dominance
sex-linked recessive
The type of inheritance pattern demonstrated here is
x-linked recessive
autosomal dominant
x-linked dominant
co-dominant
Which chromosome pair would I look at to find out what sex this individual is?
pair #1
Pair #18
pair #23
sex is not determined by only one pair of chromosomes
An abnormal condition that a person inherits through genes or chromosomes
Karyotype
Pedigree
genetic disorder
sex chromosomes
A chart or "family tree" that tracks which members of a family have a particular trait
genetic disorder
Punnett Square
Pedigree
sex-linked gene
A picture of all the chromosomes in a cell arranged in pairs
genetic disorder
Punnett Square
Pedigree
karyotype
Chromosomes that determine the sex of an individual
sex-linked trait
Punnett Square
sex chromosomes
karyotype
gene located on the X or Y chromosome
sex-linked gene
Punnett Square
sex chromosomes
karyotype
A person who has one recessive allele for a trait, but does not have the trait.
sex-linked gene
carrier
sex chromosomes
karyotype
What do we use pedigrees for?
To look at families
To make determinations about the offspring
To track traits in families
To find out what type of dog we have
Give the genotype for person II-1, for this autosomal trait.
GG
Gg
gg
we cannot be 100% sure of the genotype
If hemophilia is a sex-linked recessive trait, what genotype would individual III-3 have?
XhX
XhXh
XhYh
XhY
What type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")
Sex-Linked Dominant
Sex-Linked Recessive
Autosomal Dominant
Autosomal Recessive
A photograph or picture of chromosomes grouped in ordered pairs is called a.....
Pedigree
Chromosome chart
Mitotic index
Karyotype
