Punnett Squares

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 two parents.

Front

What does 'BB' represent in genetics?

Back

'BB' represents a homozygous dominant genotype, meaning both alleles are dominant.

Front

What does 'bb' represent in genetics?

Back

'bb' represents a homozygous recessive genotype, meaning both alleles are recessive.

Front

What does 'Bb' represent in genetics?

Back

'Bb' represents a heterozygous genotype, meaning one allele is dominant and the other is recessive.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a blend of traits.

Front

What is codominance?

Back

Codominance is a genetic situation where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

Front

If a black chicken (B) is crossed with a white chicken (b) and produces checkered offspring, what inheritance pattern is this?

Back

This is an example of codominance.

Front

What is the probability of obtaining a white fur offspring from a cross of Bb x Bb?

Back

The probability of obtaining a white fur offspring (bb) is 25%.

Front

What is the phenotypic ratio of a Bb x Bb cross?

Back

The phenotypic ratio is 3:1 (3 brown fur : 1 white fur).

Front

What is the genotypic ratio of a Bb x Bb cross?

Back

The genotypic ratio is 1:2:1 (1 BB : 2 Bb : 1 bb).