7th grade Ch5&6 Heredity and Genetics

Front

What symbol is most often used to represent a dominant trait?

Back

A capital letter.

Front

How many factors make up each trait according to Gregor Mendel's hypothesis?

Back

Two.

Front

What are the different forms of a gene called?

Back

Alleles.

Front

What is the genotype of a homozygous recessive mouse if black is dominant to white?

Back

bb.

Front

What is an organism's genetic makeup or allele combinations called?

Back

Genotype.

Front

What is the term for the physical expression of a trait?

Back

Phenotype.

Front

What do we call a trait that is expressed only when two recessive alleles are present?

Back

Recessive trait.

Front

What is the term for a cross between two individuals that examines one trait?

Back

Monohybrid cross.

Front

What is the term for a cross that examines two traits at the same time?

Back

Dihybrid cross.

Front

What is the principle that states that alleles for different traits are distributed to gametes independently of one another?

Back

Law of Independent Assortment.