Exit Ticket: DNA, Genes, Alleles, and Chromosomes

Front

What is a gene?

Back

A section/piece of DNA.

Tags

NGSS.HS-LS3-2

Front

Why is DNA important?

Back

It serves as the blueprint for traits of all living things.

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What is an allele?

Back

A variant form of a gene.

Front

What stores genetic instruction for the entire organism?

Back

DNA molecules.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What does an allele represent?

Back

The letter that represents the different forms of a gene (e.g., Dimples: D=present; d=absent).

Tags

NGSS.HS-LS3-2

Front

What are chromosomes?

Back

Structures within cells that contain DNA and carry genetic information.

Tags

NGSS.HS-LS3-1

Front

How many chromosomes do humans have?

Back

Humans typically have 46 chromosomes, arranged in 23 pairs.

Tags

NGSS.HS-LS3-1

Front

What is the relationship between genes and chromosomes?

Back

Genes are segments of DNA located on chromosomes.

Tags

NGSS.HS-LS3-1

Front

What is the difference between a dominant and a recessive allele?

Back

A dominant allele expresses its trait even in the presence of a recessive allele, while a recessive allele only expresses its trait when two copies are present.

Front

What is homozygous?

Back

Having two identical alleles for a particular gene.