Punnett Squares and Heredity

Front

What is a phenotype?

Back

An organism's physical appearance or visible traits.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by alleles.

Front

What does homozygous mean?

Back

Having two identical alleles for a particular gene.

Front

What does heterozygous mean?

Back

Having two different alleles for a particular gene.

Front

What is a Punnett Square?

Back

A diagram used to predict the outcome of a genetic cross.

Front

What is the probability of having a blue-eyed baby if both parents are heterozygous?

Back

25%.

Front

If a homozygous recessive woman marries a heterozygous man, what is the chance of having a baby with dimples?

Back

50%.

Front

What are genes?

Back

Segments of DNA that carry traits for offspring.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even if only one copy is present; recessive alleles require two copies to express their trait.

Front

What is the role of DNA in heredity?

Back

DNA carries genetic information that is passed from parents to offspring.