Punnett Square

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 T and t represent in genetics?

Back

T represents the dominant allele for tallness, while t represents the recessive allele for shortness.

Front

What is the genotype for homozygous dominant?

Back

The genotype for homozygous dominant is represented as 'AA' or 'TT', where both alleles are the same and dominant.

Front

What is the genotype for homozygous recessive?

Back

The genotype for homozygous recessive is represented as 'aa' or 'tt', where both alleles are the same and recessive.

Front

What does heterozygous mean?

Back

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

Front

What is the phenotypic ratio of a monohybrid cross?

Back

The phenotypic ratio of a monohybrid cross between two heterozygous parents (Tt x Tt) is typically 3:1.

Front

How do you determine the probability of an offspring's phenotype using a Punnett Square?

Back

You count the number of squares showing the desired phenotype and divide by the total number of squares.

Front

What is the probability of an offspring being homozygous recessive from a cross of Tt x Tt?

Back

The probability is 25% or 1 in 4.

Front

What does it mean if an organism is homozygous?

Back

An organism is homozygous if it has two identical alleles for a trait, either dominant or recessive.

Front

What is the significance of dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous conditions, determining the organism's phenotype.