Punnett Square Flashcard

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 homozygous mean?

Back

Homozygous means having two identical alleles for a particular gene, such as AA or aa.

Front

What does heterozygous mean?

Back

Heterozygous means having two different alleles for a particular gene, such as Aa.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it carries, such as AA, Aa, or aa.

Front

What is a phenotype?

Back

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

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present, while recessive traits are only expressed when two recessive alleles are present.

Front

What is the ratio of homozygous recessive offspring in a cross of two heterozygous parents (Aa x Aa)?

Back

The ratio is 1 in 4 or 25%.

Front

What does it mean if an organism is homozygous dominant?

Back

It means the organism has two dominant alleles for a trait, such as YY.

Front

What is the expected phenotype ratio from a monohybrid cross?

Back

The expected phenotype ratio is 3 dominant to 1 recessive.

Front

What does the term 'allele' refer to?

Back

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