Punnett Squares

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genotype and phenotype combinations of a genetic cross.

Front

What does homozygous dominant mean?

Back

Homozygous dominant refers to having two identical dominant alleles for a trait, represented as 'YY'.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype refers to the observable physical characteristics.

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 the probability of obtaining a homozygous recessive offspring from a cross between two heterozygous parents?

Back

The probability is 25%.

Front

What does the notation 'Bb' represent?

Back

'Bb' represents a heterozygous genotype, where 'B' is a dominant allele and 'b' is a recessive allele.

Front

What is the significance of the 25% probability in a Punnett Square?

Back

It indicates the likelihood of an offspring inheriting a specific genotype from a genetic cross.

Front

What is a phenotype?

Back

A phenotype is the physical expression or characteristics of a trait in an organism.

Front

What does it mean if two individuals have the same phenotype but different genotypes?

Back

It means they exhibit the same observable traits but have different genetic compositions.

Front

What is the purpose of using a Punnett Square in genetics?

Back

The purpose is to visualize and calculate the potential genetic outcomes of a cross between two organisms.