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 the parents.

Front

What do the letters in a Punnett Square represent?

Back

The letters represent alleles, where uppercase letters denote dominant alleles and lowercase letters denote recessive alleles.

Front

What is the probability of getting a recessive trait in a Punnett Square with a Bb x Bb cross?

Back

25%.

Tags

NGSS.HS-LS3-3

Front

What is the genotype for brown fur in the given example?

Back

B (dominant allele for brown fur).

Front

What is the phenotype for the genotype 'bb'?

Back

White fur (since 'b' is the recessive allele).

Front

What does it mean if an organism is homozygous?

Back

It means the organism has two identical alleles for a particular gene (e.g., BB or bb).

Front

What does it mean if an organism is heterozygous?

Back

It means the organism has two different alleles for a particular gene (e.g., Bb).

Front

What is codominance?

Back

Codominance is a condition where both alleles for a gene are fully expressed, resulting in offspring with a phenotype that shows both traits.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a third phenotype that is a blend of the two.

Front

In a cross between TT and tt, what are the possible genotypes of the offspring?

Back

All offspring will be Tt (100%).