Ch. 44 Introduction to Genetics

What is genetics?

• The study of weather

• The study of plants

• The study of rocks

• The study of heredity

Who is considered the father of modern genetics?

• Charles Darwin

• Isaac Newton

• Gregor Mendel

• Albert Einstein

What are genes?

• Units of hereditary information

• Types of plants

• Types of weather patterns

• Types of animals

What is the difference between dominant and recessive traits?

• Both dominant and recessive traits are always hidden

• Both dominant and recessive traits are always expressed

• Dominant traits are expressed, recessive traits are hidden

• Dominant traits are hidden, recessive traits are expressed

How are recessive traits preserved across generations?

• They are hidden but still present in the genotype

• They are always expressed in offspring

• They are not preserved

• They are erased by dominant traits

What is the genotype of an organism?

• Its physical characteristics

• Its genetic composition

• Its dominant traits

• Its recessive traits

What is the difference between a homozygous tall plant and a heterozygous tall plant?

• Homozygous plants have one allele, heterozygous plants have no alleles

• Homozygous plants have no alleles, heterozygous plants have one allele

• Homozygous plants have two identical alleles, heterozygous plants have two different alleles

• Homozygous plants have two different alleles, heterozygous plants have two identical alleles

What is the function of a Punnett square?

• To erase recessive traits

• To predict the phenotype of offspring

• To express dominant traits

• To predict the genotype of offspring

What is a monohybrid cross?

• A cross between two genes

• A cross between two traits

• A cross between two generations

• A cross between two organisms

What is a dihybrid cross?

• A cross between two traits

• A cross between two genes

• A cross between two organisms

• A cross between two generations