Punnett Square Practice

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genetic makeup of offspring from two parents based on their genotypes.

Front

What does homozygous dominant mean?

Back

Homozygous dominant refers to having two identical dominant alleles for a trait (e.g., AA).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a trait (e.g., Aa).

Front

What is the probability of an offspring being homozygous dominant if both parents are heterozygous?

Back

25% chance.

Front

What is the probability of an offspring having a dominant trait if one parent is homozygous dominant and the other is homozygous recessive?

Back

100% chance.

Front

What is the definition of a recessive trait?

Back

A recessive trait is expressed only when an individual has two recessive alleles (e.g., aa).

Front

How do you calculate the probability of offspring traits using a Punnett Square?

Back

By filling in the square with the possible allele combinations from each parent and counting the outcomes.

Front

What is the chance of an offspring being heterozygous if both parents are heterozygous?

Back

50% chance.

Front

What does it mean if an offspring has no belly fur in terms of alleles?

Back

It means the offspring has two recessive alleles for the belly fur trait (e.g., aa).

Front

What is the expected phenotypic ratio for a monohybrid cross?

Back

The expected phenotypic ratio is 3:1 for dominant to recessive traits.