Punnett Squares 2

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genetic makeup of offspring from two parents based on their genotypes.

Front

What does genotype mean?

Back

Genotype refers to the genetic code of an organism, represented by letters (e.g., AA, Aa, aa).

Front

What does phenotype mean?

Back

Phenotype is the observable physical characteristics of an organism, such as hair color.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait (e.g., AA or aa), while heterozygous means having two different alleles (e.g., Aa).

Front

What does it mean if an organism is homozygous dominant?

Back

An organism is homozygous dominant if it has two dominant alleles for a trait (e.g., AA).

Front

What does it mean if an organism is homozygous recessive?

Back

An organism is homozygous recessive if it has two recessive alleles for a trait (e.g., aa).

Front

What is the expected phenotype ratio from a monohybrid cross of two heterozygous parents (Aa x Aa)?

Back

The expected phenotype ratio is 3:1, with 3 showing the dominant trait and 1 showing the recessive trait.

Front

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

Back

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

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present (e.g., A in Aa).

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present (e.g., aa).