Punnett Squares

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 the term 'genotype' refer to?

Back

Genotype refers to the genetic constitution of an individual, specifically the alleles inherited from the parents.

Front

What does the term 'phenotype' refer to?

Back

Phenotype refers to the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Front

What is the probability of inheriting a trait?

Back

The probability of inheriting a trait can be calculated using a Punnett Square, which shows the possible combinations of alleles from the parents.

Front

What does 'homozygous' mean?

Back

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

Front

What does 'heterozygous' mean?

Back

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

Front

If B = brown fur and b = white fur, what is the genotype for brown fur?

Back

The genotype for brown fur can be either homozygous (BB) or heterozygous (Bb).

Front

What is the expected phenotypic ratio in a monohybrid cross?

Back

The expected phenotypic ratio in a monohybrid cross is typically 3:1 for dominant to recessive traits.

Front

What is the expected genotypic ratio in a monohybrid cross?

Back

The expected genotypic ratio in a monohybrid cross is 1:2:1 for homozygous dominant, heterozygous, and homozygous recessive.

Front

What is the significance of dominant and recessive alleles?

Back

Dominant alleles express their traits even when only one copy is present, while recessive alleles only express their traits when two copies are present.