Study guide 8th grade science fall semester test 2024

Front

What does the genotype of an organism describe?

Back

The genetic make-up of a trait.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

Which gender can be carriers of colorblindness and not have it?

Back

Just females.

Front

In which layer of sedimentary rock are the oldest organisms found?

Back

Layer 1.

Tags

NGSS.MS-ESS1-4

Front

What are the preserved remains of physical evidence of an organism that lived in the past called?

Back

Fossils.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Front

What are the structures that carry the information for traits called?

Back

Genes.

Front

What is the process by which traits are passed from parents to offspring?

Back

Heredity.

Tags

NGSS.MS-LS3-2

Front

What is a mutation?

Back

A change in the DNA sequence of an organism.

Tags

NGSS.MS-LS3-1

NGSS.MS-LS4-4

Front

What is the role of chromosomes in genetics?

Back

They carry genes that determine traits.

Tags

NGSS.HS-LS3-1

Front

What is a pedigree chart used for?

Back

To track the inheritance of traits in a family.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present; recessive traits are expressed only when two recessive alleles are present.