Genetics and Punnett Squares

Front

What is a dominant allele?

Back

A dominant allele is a gene that always shows its effect in the phenotype, even if only one copy is present.

Front

What is a recessive allele?

Back

A recessive allele is a gene that only shows its effect in the phenotype if two copies are present.

Front

What does phenotype mean?

Back

Phenotype refers to the physical appearance or characteristics of an organism, determined by its genotype.

Front

What does genotype mean?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it carries.

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

Front

If a plant has the genotype 'TT', what is its phenotype?

Back

The phenotype is tall, as 'T' is a dominant allele.

Front

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

Back

The phenotype is short, as 't' is a recessive allele.

Front

What is the dominant trait in pea plants?

Back

The dominant trait in pea plants is yellow seeds.

Front

What is the recessive trait in pea plants?

Back

The recessive trait in pea plants is green seeds.

Front

How can you tell if a trait is dominant or recessive?

Back

A trait is dominant if it appears in the phenotype with just one allele; it is recessive if it only appears when two alleles are present.