Quiz 2

Question 1

What type of Non-Mendelian Inheritance explains the event where two alleles are neither dominant nor recessive, yet are equally expressed in the phenotype without mixing together?

Epistasis
Incomplete dominance
Multiple alleles
Co-dominance

Answer 1

Co-dominance

Question 2

Which of the following statements are true regarding the findings of Thomas Morgan?

The understanding of epistasis came from his work.
The recombinant phenotypes were the result of a crossing over event, where two homologous chromosomes physically exchange corresponding segments.
A cross over exchange event involves all four chromatids.
When he performed crosses with fruit flies, he found that the yielded phenotypic ratios followed Mendel’s law of independent assortment.

Answer 2

The recombinant phenotypes were the result of a crossing over event, where two homologous chromosomes physically exchange corresponding segments.

Question 3

What is an example of multiple alleles?

Cow coat color
ABO Blood system
Dog coat color
Hair Type

Answer 3

ABO Blood system

Question 4

What is false regarding epistasis?

Duplicate gene interaction is when two alleles are separate, the effects are similar, however, when those alleles are together, the effect is further enhanced.
Epistasis is when genes not only control their own expression but can also mask or regulate the expression of other genes.
Dominant epistasis will result in the ratio 12:3:1.
An example of recessive epistasis is the color of squash.

Answer 4

An example of recessive epistasis is the color of squash.

Question 5

Which statement correctly defines extra nuclear inheritance?

Traits controlled by two or more genes.
The inheritance of a trait is determined by a gene located on one of the sex chromosomes.
Also known as cytoplasmic inheritance, it refers to the transmission of genes that take place outside of the nucleus.
When a piece of DNA sequence information is transferred from one DNA strand to another DNA strand.

Answer 5

Also known as cytoplasmic inheritance, it refers to the transmission of genes that take place outside of the nucleus.

Question 6

Which of the following is not a type of sex determination?

ZZ/Z0
XX/XZ
Location-dependent
XX/XY

Answer 6

XX/XZ

Question 7

Which of the following statement is true about the ZW/ZZ sex-determination system?

Females have 2 of the same kind of chromosomes, while males have only one.
Females have 2 different kinds of chromosomes, and males have 2 of the same kind of chromosomes.
Males have 2 different kinds of chromosomes, and females have 2 of the same kind of chromosomes.
Males have 2 of the same kind of chromosomes, while females have only one.

Answer 7

Females have 2 different kinds of chromosomes, and males have 2 of the same kind of chromosomes.

Question 8

Which is not an example of a disorder caused by sex chromosomes?

Hemophilia
Klinefelter syndrome
Color-blindness
Huntington disease

Answer 8

Huntington disease

Question 9

Where can DNA be found in eukaryotic cells?

Nucleus
Chloroplast
All of the above
Mitochondria

Answer 9

All of the above

Question 10

All of the following are genomic paradoxes except:

P-value Paradox, cell type
K-value Paradox, number of chromosomes
N-value Paradox, number of genes
C-value Paradox, genome size

Answer 10

P-value Paradox, cell type