Epistasis

This pattern of inheritance is demonstrated when a gene from one locus can prevent the full expression of another gene at a different locus. 

• Multiple alleles

• Polygenic Inheritance

• Codominance 

• Epistasis

Epistasis is the interaction between_____________ genes.

• 2

• 4

• 3

• 16

Which best describes epistasis?

• An allele that changes the genotype of another allele

• A gene that changes the genotype of another gene

• An allele that controls or masks the expression of another allele

• A gene that controls or masks the expression of another gene

Labrador retriever's fur color is an example of epistasis. In this case the E gene controls the expression of the B gene. It a puppy was born with the genotype eeBB its fur color would be ________ and if it was born with the genotype EEbb it would be __________

• yellow, yellow

• yellow, black

• chocolate, black

• yellow, chocolate

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following best describes epistasis?

• One gene affects the expression of another gene.

• Two genes are located on the same chromosome.

• One allele is dominant over another allele.

• Genes are inherited independently of each other.

What is the color of the two parents? bbAa x BbAa

• Yellow x White

• Yellow x Yellow

• White x Yellow

• Yellow x green

• green x yellow

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In case of two gene interaction, the gene which is masking the expression of another is called_____________ and the gene whose expression is masked is called_______________

• Dominant, recessive

• Recessive, dominant

• Epistatic, hypostatic

• Hypostatic, Epistatic

Epistasis is the interaction between_____________ genes.

• 1

• 2

• 3

• 4

Which of the following best describes epistasis?

• One gene affects the expression of another gene.

• Two genes are located on the same chromosome.

• One allele is dominant over another allele.

• Genes are inherited independently of each other.

In case of two gene interaction, the gene which is masking the expression of another is called_____________ and the gene whose expression is masked is called_______________

• Dominant, recessive

• Recessive, dominant

• Epistatic, hypostatic

• Hypostatic, Epistatic