Biology LEAP Review: Genetics and Heredity

Front

What are the building blocks of nucleic acids?

Back

Nucleotides are the building blocks of nucleic acids.

Front

What are nucleotides composed of?

Back

Nucleotides are composed of a sugar, a phosphate group, and a nitrogen base.

Front

What does it mean if an organism is heterozygous for a trait?

Back

An organism is heterozygous for a trait if it has different alleles for that trait.

Front

What is a dominant allele?

Back

A dominant allele is one that is expressed in the phenotype even when only one copy is present.

Front

What is a recessive allele?

Back

A recessive allele is one that is only expressed in the phenotype when two copies are present.

Front

What is the sugar found in DNA?

Back

The sugar in DNA is deoxyribose.

Front

What is the Law of Independent Assortment?

Back

The Law of Independent Assortment states that genes for different traits are inherited independently of one another.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait, while heterozygous means having two different alleles.

Front

What is the role of a gene?

Back

A gene is a segment of DNA that codes for a specific trait.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism.