Unit 2 Practice

Front

What is a gene?

Back

A gene is a segment of DNA that contains the instructions for building a specific protein or trait, such as hair color.

Front

What does DNA stand for?

Back

DNA stands for deoxyribonucleic acid, which is the molecule that carries genetic information.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as AA or aa.

Front

What are the basic building blocks of DNA?

Back

The basic building blocks of DNA are nucleotides, which consist of a sugar, a phosphate group, and a nitrogenous base.

Front

What is a nucleotide?

Back

A nucleotide is the structural unit of DNA and RNA, made up of a sugar, a phosphate group, and a nitrogenous base.

Front

What is the structure of DNA?

Back

DNA has a double helix structure, resembling a twisted ladder.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous has two identical alleles (e.g., AA), while heterozygous has two different alleles (e.g., Aa).

Front

What are alleles?

Back

Alleles are different versions of a gene that can produce variations in a trait.

Front

What is the role of nucleotides in DNA?

Back

Nucleotides serve as the building blocks of DNA and encode genetic information.

Front

What is a trait?

Back

A trait is a characteristic or feature of an organism, such as eye color or height.