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 mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as AA or aa.

Front

What does heterozygous mean?

Back

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

Front

What is the purpose of using a Punnett Square?

Back

The purpose is to determine the probability of an offspring inheriting particular traits from its parents.

Front

What is the genotype?

Back

The genotype is the genetic constitution of an individual, represented by the alleles it possesses.

Front

What is the phenotype?

Back

The phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

If one parent is homozygous dominant (AA) and the other is homozygous recessive (aa), what are the possible genotypes of the offspring?

Back

All offspring will be heterozygous (Aa).

Front

What is the probability of obtaining a homozygous recessive offspring from two heterozygous parents (Aa x Aa)?

Back

The probability is 25%.

Front

What is the chance of an offspring being heterozygous for a trait if both parents are heterozygous (Aa x Aa)?

Back

The chance is 50%.

Front

What does it mean if a trait is dominant?

Back

A dominant trait is one that will express itself in the phenotype even if only one dominant allele is present.