Punnett Squares

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genetic makeup of offspring from a particular cross or breeding experiment.

Front

What does homozygous dominant mean?

Back

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

Front

What does homozygous recessive mean?

Back

Homozygous recessive refers to having two identical recessive alleles for a trait, represented as 'aa'.

Front

What is a heterozygous genotype?

Back

A heterozygous genotype has two different alleles for a trait, represented as 'Aa'.

Front

If a Punnett Square shows a 50% chance of homozygous dominant offspring, what does this mean?

Back

It means that out of four possible offspring, two are expected to have the homozygous dominant genotype.

Front

What is the genotype of an organism with the alleles 'XX'?

Back

The genotype 'XX' is homozygous dominant.

Front

What is the genotype of an organism with the alleles 'dd'?

Back

The genotype 'dd' is homozygous recessive.

Front

What is the phenotype of a homozygous dominant organism?

Back

The phenotype of a homozygous dominant organism expresses the dominant trait.

Front

How do you determine the mother's genotype in a genetic cross?

Back

The mother's genotype can be determined by analyzing the offspring's genotypes and the father's genotype.

Front

What is the expected genotype ratio from a monohybrid cross?

Back

The expected genotype ratio from a monohybrid cross is typically 1:2:1.