Basic Genetics Check-Up

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses for a particular trait.

Front

What is a Punnett Square used for?

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 does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, either dominant or recessive.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, one dominant and one recessive.

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present in the genotype.

Front

What is a recessive allele?

Back

A recessive allele is an allele whose trait is only expressed when two copies are present in the genotype.

Front

What is the phenotypic ratio in a genetic cross?

Back

The phenotypic ratio is the ratio of different phenotypes (observable traits) that appear in the offspring from a genetic cross.

Front

What is the genotypic ratio in a genetic cross?

Back

The genotypic ratio is the ratio of different genotypes (genetic makeups) that appear in the offspring from a genetic cross.

Front

What is the probability of an event?

Back

The probability of an event is a measure of the likelihood that the event will occur, expressed as a fraction or percentage.

Front

If two heterozygous parents (Aa) have offspring, what is the probability of having a homozygous recessive offspring (aa)?

Back

The probability is 25%.