genetics ch 5-6

C) it cannot be determined

What is the genotype of the male parent for a snail that has the genotype Dd and has a left-hand twist shell?

A) dd

B) DD

C) it cannot be determined

D) Dd

A) Nurse cells ?

Which of the following is primarily responsible for the maternal effect as seen in snail shell coiling?

A) Nurse cells

B) Placenta

C) Sperm cells

D) Oocytes

D) dd ?

What would be the genotype of the female parent of a female snail that has a Dd genotype and a shell with a left-hand twist?

A) Cannot tell since the shell twist phenotype of any offspring depends on the genotype of the male parent as well as the female parent.

B) DD

C) Dd

D) dd

B) X-inactivation

The coat color of calico cats is a result of _________

A) extranuclear inheritance

B) X-inactivation

C) maternal inheritance

D) imprinting

B) X-inactivation

The Lyon hypothesis attempts to explain the molecular mechanism of _________

A) maternal inheritance

B) X-inactivation

C) extranuclear inheritance

D) genomic imprinting

B) 1

How many Barr bodies would an individual with a XXY genotype possess?

A) 0

B) 1

C) 2

D) None

??? B) Some cells will express enough alpha-galactosidase A and some cells will not express enough alpha-galactosidase A.

A female has Fabry disease, which is an X-linked recessive disorder. It is caused by mutations in the gene for alpha-galactosidase A that result in not enough of the enzyme being made.

What is true about individual cells in this female's body?

A) All cells will express sufficient alpha-galactosidase A.

B) Some cells will express enough alpha-galactosidase A and some cells will not express enough alpha-galactosidase A.

C) None of the cells will express sufficient alpha-galactosidase A.

D) The amount of alpha-galactosidase A in each cell will depend on the pattern of X-inactivation.

B) genotype; phenotype

In maternal effect, the _________blank of the female parent determines the _________blank of the offspring.

A) phenotype; genotype

B) genotype; phenotype

C) rRNA; tRNA

D) imprinting; genotype

C) Rr female x Rr male

R and r represent dominant and recessive alleles, respectively, for a gene that is imprinted. Imprinting of the allele occurs in the male and the allele is silenced when it is imprinted.

Which mating would result in a ratio of 1:1 of dominant and recessive phenotypes in the offspring?

A)RR female x rr male

B) rr female x RR male

C) Rr female x Rr male

D) rr female x Rr male

???C) 50%

INS is the human gene that encodes insulin. This gene is imprinted such that the paternal allele is expressed. Rare cases of diabetes are caused by autosomal dominant INS-gene mutations. A male that has diabetes due to an autosomal dominant INS mutation has children with a genotypically normal female.

What percentage of their children will have diabetes due to an autosomal dominant INS mutation?

A) 100%

B) There is not enough information to answer this question without knowing the male's genotype.

C) 50%

D) 0%

C) Her male parent likely had an autosomal dominant INS mutation that wasn't expressed because it was inherited from his female parent.

INS is the human gene that encodes insulin. This gene is imprinted such that the paternal allele is expressed. Rare cases of diabetes are caused by autosomal dominant INS-gene mutations. A young female is diagnosed with diabetes caused by an autosomal dominant INS-gene mutation. However, neither of her parents have diabetes. Curiously, the doctors still think she inherited this allele from her parents.

How can this be?

A) Her female parent likely had an autosomal dominant INS mutation that wasn't expressed because it was inherited from her male parent.

B) Her female parent likely had an autosomal dominant INS mutation that wasn't expressed because it was inherited from her female parent.

C) Her male parent likely had an autosomal dominant INS mutation that wasn't expressed because it was inherited from his female parent.

D) Her male parent likely had an autosomal dominant INS mutation that wasn't expressed because it was inherited from his male parent.

D) Paternal

In the Igf2 gene, which allele is expressed?

A) Both maternal and paternal

B) Maternal

C) Neither allele is expressed

D) Paternal

A) Angelman Syndrome

Which disease is associated with imprinting?

A) Angelman Syndrome

B) LHON

C) Alzheimer's Disease

D) All of these choices are correct.

B) maternal inheritance

The inheritance of leaf pigmentation in the four-o'clock plant Mirabilis jalapa is an example of _________

A) maternal effect

B) maternal inheritance

C) epigenetic inheritance

D) imprinting

D) Genes encoding nuclear proteins.

Which of the following categories of genes is typically NOT encoded in cpDNA?

A) Genes encoding rRNA.

B) Genes encoding tRNA.

C) Genes for photosynthetic pathway enzymes.

D) Genes encoding nuclear proteins.

A) extranuclear inheritance

The inheritance patterns of genetic material that is not contained in the nucleus of the cell is called _________

A) extranuclear inheritance

B) maternal effect

C) imprinting

D) nuclear

E) epigenetic

E) mitochondrial DNA; chloroplast DNA

mtDNA stands for _________blank and cpDNA stands for _________

A) extranuclear DNA; cytoplasmic DNA

B) maternal DNA; paternal DNA

C) marked DNA; copied DNA

D) nuclear; cytoplasmic

E) mitochondrial DNA; chloroplast DNA

A) Destruction of sperm mitochondria after fertilization

Which mechanism of maternal inheritance that relies on ubiquitin?

A) Destruction of sperm mitochondria after fertilization

B) Destruction of sperm mitochondrial DNA prior to fertilization

C) Lack of entry of sperm mitochondria

B) It is a linear chromosome.

Which of the following is false regarding human mtDNA?

A) It is around 17,000 bp in length.

B) It is a linear chromosome.

C) Multiple copies exist in each mitochondria.

D) It mostly contains rRNA and tRNA genes, and genes for mitochondrial function.

D) Maternal inheritance

What type of inheritance is typically observed with extranuclear DNA?

A) Mendelian inheritance

B) Sex-linked inheritance

C) Paternal inheritance

D) Maternal inheritance

E) Maternal effect