Front

What are chromosomes?

Back

Chromosomes are structures within cells that contain DNA and carry genetic information. They are inherited from both parents.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Front

What is a phenotype?

Back

The phenotype refers to the physical traits or characteristics of an organism that are expressed as a result of its genotype.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What does it mean if a trait is dominant?

Back

A dominant trait is one that will be expressed in the phenotype even if only one copy of the allele is present.

Tags

NGSS.HS-LS3-1

Front

What does it mean if a trait is recessive?

Back

A recessive trait is one that will only be expressed in the phenotype if two copies of the allele are present.

Front

What is the genotype of an organism?

Back

The genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Tags

NGSS.HS-LS3-2

Front

If a cat has the genotype Ww, what is its phenotype regarding whiskers?

Back

The cat will have short whiskers because the allele for short whiskers (W) is dominant over the allele for long whiskers (w).

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Front

If a plant has the genotype tt, what is its phenotype regarding height?

Back

The plant will be short because the allele for short height (t) is recessive.

Tags

NGSS.HS-LS3-1

Front

What genotype must an individual have to express a recessive trait?

Back

An individual must have two copies of the recessive allele (e.g., bb for green eyes) to express a recessive trait.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic constitution of an organism, while phenotype refers to the observable physical traits.

Tags

NGSS.HS-LS1-1

Front

What does it mean for brown eyes to be dominant over green eyes?

Back

It means that if an individual has at least one allele for brown eyes (B), they will have brown eyes, while green eyes (bb) will only appear if both alleles are for green.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2