Genetics

Why are identical twins genetically identical?

• They inherit exactly the same genes from their parents

• They live in the same environment

• They eat the same food

• They are born at the same time

Tags

NGSS.HS-LS3-1

A segment of DNA that codes for a trait

• gene

• centromere

• chromosome

• chromatid

Tags

NGSS.HS-LS3-1

Which of the following best describes why siblings (except identical twins) do not look exactly alike?

• They inherit different genes from their parents

• They choose different lifestyles

• They eat different foods

• They live in different environments

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the main function of genes?

• To provide energy to the cells

• To digest food

• To determine the traits of an organism

• To protect the cell from viruses

Tags

NGSS.HS-LS3-1

What is DNA?

• A type of protein that helps in digestion

• A molecule that contains the instructions an organism needs to develop, live, and reproduce

• A cell component that provides energy for the cell

• A type of carbohydrate that stores energy

Tags

NGSS.MS-LS3-1

What is an allele?

• A trait

• Different forms of a gene

• DNA

• Different types of parents

Tags

NGSS.HS-LS3-2

What is a genotype?

• Pair of alleles that determine a specific trait

• Observable physical trait

• A trait that is observed with only one copy of an allele

Tags

NGSS.HS-LS3-1

If a person is heterozygous for a trait, their genotype can be...

• Aa

• AA, aa

• AA, Aa

• AA

Tags

NGSS.HS-LS3-2

What is the missing pairing?

• AA

• Aa

• aa

Tags

NGSS.HS-LS3-1

Using the Punnett Square, identify the correct Genotypic ratio

• 2:2:1

• 1:2:1

• 2:1:1

• 1:1:1