Punnett Squares- period 8

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 from the parents.

Front

What does the term 'allele' mean?

Back

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

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the combination of alleles (e.g., AA, Aa, aa).

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even if only one copy is present, while recessive alleles require two copies to express their trait.

Front

If a parent has the genotype Bb, what alleles can they pass on to their offspring?

Back

The parent can pass on either the B allele or the b allele.

Front

What does it mean if an organism is homozygous?

Back

An organism is homozygous if it has two identical alleles for a particular gene (e.g., AA or aa).

Front

What does it mean if an organism is heterozygous?

Back

An organism is heterozygous if it has two different alleles for a particular gene (e.g., Aa).

Front

In a Punnett Square, what do the rows and columns represent?

Back

The rows represent the alleles from one parent, and the columns represent the alleles from the other parent.

Front

What is the expected genotype ratio from a cross between two heterozygous parents (Aa x Aa)?

Back

The expected genotype ratio is 1 AA : 2 Aa : 1 aa.