Introduction to Genetics

Front

What is an allele?

Back

An allele is a variant form of a gene that can produce different traits.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

NGSS.HS-LS4-3

Front

What is a dominant allele?

Back

A dominant allele is an allele whose trait always shows up in the organism when it is present.

Front

What is a recessive allele?

Back

A recessive allele is an allele whose trait only shows up when no dominant allele is present.

Front

What is a phenotype?

Back

A phenotype is the physical expression or characteristics of a trait in an organism.

Front

What is a genotype?

Back

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

Tags

NGSS.HS-LS3-2

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

How are recessive alleles represented?

Back

Recessive alleles are represented by lowercase letters.

Front

How are dominant alleles represented?

Back

Dominant alleles are represented by capital letters.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the outcome of a genetic cross.