Exploring Complex Patterns of Inheritance

Mr. Kite introduces a webcast on genetics, focusing on complex inheritance. He reviews Mendel's law of inheritance and its limitations, explaining concepts like incomplete dominance, co-dominance, multiple alleles, pleiotropy, epistasis, and polygenic inheritance. The video also discusses the interplay between genetics and environment, using examples like alcoholism and hydrangea flower color.

What is the main objective of this video?

• To introduce new genetic technologies

• To compare and contrast situations that deviate from Mendel's law of inheritance

• To explain the basics of genetics

• To discuss the history of genetics

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According to Mendel's model, how many alleles are there for each trait?

• Two

• Four

• One

• Three

What does dominance mean in the context of genetics?

• A gene that produces less of a substance

• A gene that does not produce any substance

• A gene that interacts with other genes

• A gene that produces more of a substance

In incomplete dominance, what is the result of crossing a red flower with a white flower?

• Red flowers

• White flowers

• Pink flowers

• Both red and white flowers

What is the key difference between incomplete dominance and co-dominance?

• Incomplete dominance shows both parental phenotypes, while co-dominance results in a blended phenotype

• Incomplete dominance results in a blended phenotype, while co-dominance shows both parental phenotypes

• Incomplete dominance only occurs in plants, while co-dominance occurs in animals

• There is no difference between incomplete dominance and co-dominance

How many alleles are involved in determining blood type?

• Four

• Three

• Two

• One

What is pleiotropy?

• One gene affecting another gene

• Multiple genes affecting multiple traits

• One gene affecting multiple traits

• Multiple genes affecting one trait

In epistasis, what is the relationship between genes?

• Genes produce different substances

• Genes produce the same substance

• Genes do not interact with each other

• One gene affects the expression of another gene

What is polygenic inheritance?

• One gene affecting multiple traits

• Multiple genes affecting one trait

• Multiple genes affecting multiple traits

• One gene affecting another gene

What factor can influence the expression of a gene in hydrangea flowers?

• Sunlight

• Temperature

• Soil pH

• Water availability

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