Gene Interactions Review

What is genetic linkage?

• The process of homologous recombination during gamete formation

• The exchange of large sections of DNA between non-homologous chromosomes

• The tendency for genes that are close together on a chromosome to be inherited together

• The tendency for genes to be inherited independently of each other

What is pleiotropy in genetics?

• When one gene affects multiple traits in an organism

• The tendency for genes to be inherited independently of each other

• The exchange of large sections of DNA between non-homologous chromosomes

• The process of homologous recombination during gamete formation

What is polygenic inheritance?

• The additive effects of multiple genes influencing a trait

• The tendency for genes to be inherited independently of each other

• The process of homologous recombination during gamete formation

• The exchange of large sections of DNA between non-homologous chromosomes

What is epistasis in genetics?

• The tendency for genes to be inherited independently of each other

• The process of homologous recombination during gamete formation

• When one gene masks or interferes with the expression of another gene

• The exchange of large sections of DNA between non-homologous chromosomes

What was the first experiment to demonstrate genetic linkage?

• Crossing pea plants and observing certain traits being inherited together

• Exchanging large sections of DNA between non-homologous chromosomes

• Observing the process of homologous recombination during gamete formation

• Demonstrating the Law of Independent Assortment

What is the result of homologous recombination during gamete formation?

• Decreased genetic diversity

• Increased genetic diversity

• No change in genetic diversity

• No impact on allele combinations

What is the impact of pleiotropy on an organism's traits?

• It leads to genetic correlations and responses to selection

• It limits the rate of multivariate evolution

• It has no impact on an organism's traits

• It only affects a single trait in an organism

What is an example of a trait controlled by polygenic inheritance?

• Blood type

• Eye color

• Hair texture

• Earlobe attachment

How does polygenic inheritance differ from Mendelian inheritance?

• It is not influenced by environmental factors

• It involves the additive effects of multiple genes

• It only involves a single gene

• It results in distinct categories of traits

What is an example of epistasis in genetics?

• The wild-type coat color in mice

• The process of homologous recombination during gamete formation

• The exchange of large sections of DNA between non-homologous chromosomes

• The tendency for genes to be inherited independently of each other