umkc genetics exam 1 questions with complete solutions
A right-handed coiled snail is the result of a cross between two
snails. If this offspring snail is genotypically dd (left-handed
genotype), what is the genotype of the snail that provided the
egg? Correct Answer Dd
achondroplasia Correct Answer a common form of dwarfism
associated with a defect in the growth of long bones
autosomal dominant
aicardi syndrome Correct Answer characterized by the partial
or complete absence of a key structure in the brain called the
corpus callosum, and the presence of retinal abnormalities; fatal
in males
albinism Correct Answer inability to produce melanin, results
in white skin, hair, etc.
autosomal recessive
All of the following may account for mitochondrial diseases
EXCEPT...
maternal inheritance
uniparental inheritance
heteroplasmy
maternal effect Correct Answer maternal effect
allele Correct Answer alternate form of a gene
Amorphic and hypomorphic mutations are similar in that they
both are... Correct Answer loss-of-function mutations
,androgen insesitivity syndrome Correct Answer missing male
steroid hormone receptor, XY individuals have external features
that are feminine but internally have undescended testes and no
uterus
X-linked recessive
angelman syndrome (AS) Correct Answer thin, hyperactive,
seizures, mental deficiencies
Angelman syndrome is due to inheriting the AS gene from the
mother. Correct Answer False
aniridia Correct Answer absense of the iris of the eye, leading
to visual impairment and sometimes blindness
autosomal dominant
AS develops if a deletion in chromosome 15 is inherited from
the __________. Correct Answer mother
AS gene Correct Answer maternal copy is active in the brain,
paternal is silent
autosomal dominant traits Correct Answer affected
individuals are usually Aa, have one or both affected parents,
trait occurs with the same frequency in both sexes
barr body Correct Answer A dense body formed from an
inactivated X chromosome.
, binomial expansion equation Correct Answer Represents all
of the possibilities for a given set of unordered events
((n!)/x!(n-x)!)p^xq^n-x
chromosomes in which the centromere is in the middle are...
Correct Answer metacentric
codominance Correct Answer when the heterozygote
expresses both alleles simuntaneously- an individual with A and
B alleles will have the AB blood type
complementation analysis Correct Answer determines
whether two independently isolated mutations are in the same
gene (alleles) or in separate genes
cystic fibrosis Correct Answer water imbalance in tissues of
the pancreas, intestine, sweat glands, and lungs due to impaired
ion transport; leads to lung damage
autosomal recessive
diploid (2n) Correct Answer cells/individuals with 2 sets of
chromosomes
DNA segments are marked by... Correct Answer methylation
of cytosine bases in the imprinting control region
dominant Correct Answer trait or allele that determines the
phenotype in a heterozygous individual
dominant epistasis Correct Answer 12:3:1
A right-handed coiled snail is the result of a cross between two
snails. If this offspring snail is genotypically dd (left-handed
genotype), what is the genotype of the snail that provided the
egg? Correct Answer Dd
achondroplasia Correct Answer a common form of dwarfism
associated with a defect in the growth of long bones
autosomal dominant
aicardi syndrome Correct Answer characterized by the partial
or complete absence of a key structure in the brain called the
corpus callosum, and the presence of retinal abnormalities; fatal
in males
albinism Correct Answer inability to produce melanin, results
in white skin, hair, etc.
autosomal recessive
All of the following may account for mitochondrial diseases
EXCEPT...
maternal inheritance
uniparental inheritance
heteroplasmy
maternal effect Correct Answer maternal effect
allele Correct Answer alternate form of a gene
Amorphic and hypomorphic mutations are similar in that they
both are... Correct Answer loss-of-function mutations
,androgen insesitivity syndrome Correct Answer missing male
steroid hormone receptor, XY individuals have external features
that are feminine but internally have undescended testes and no
uterus
X-linked recessive
angelman syndrome (AS) Correct Answer thin, hyperactive,
seizures, mental deficiencies
Angelman syndrome is due to inheriting the AS gene from the
mother. Correct Answer False
aniridia Correct Answer absense of the iris of the eye, leading
to visual impairment and sometimes blindness
autosomal dominant
AS develops if a deletion in chromosome 15 is inherited from
the __________. Correct Answer mother
AS gene Correct Answer maternal copy is active in the brain,
paternal is silent
autosomal dominant traits Correct Answer affected
individuals are usually Aa, have one or both affected parents,
trait occurs with the same frequency in both sexes
barr body Correct Answer A dense body formed from an
inactivated X chromosome.
, binomial expansion equation Correct Answer Represents all
of the possibilities for a given set of unordered events
((n!)/x!(n-x)!)p^xq^n-x
chromosomes in which the centromere is in the middle are...
Correct Answer metacentric
codominance Correct Answer when the heterozygote
expresses both alleles simuntaneously- an individual with A and
B alleles will have the AB blood type
complementation analysis Correct Answer determines
whether two independently isolated mutations are in the same
gene (alleles) or in separate genes
cystic fibrosis Correct Answer water imbalance in tissues of
the pancreas, intestine, sweat glands, and lungs due to impaired
ion transport; leads to lung damage
autosomal recessive
diploid (2n) Correct Answer cells/individuals with 2 sets of
chromosomes
DNA segments are marked by... Correct Answer methylation
of cytosine bases in the imprinting control region
dominant Correct Answer trait or allele that determines the
phenotype in a heterozygous individual
dominant epistasis Correct Answer 12:3:1
