Genetics Practice

Front

What is a genotype?

Back

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

Front

What does heterozygous mean?

Back

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

Front

What is a homozygous genotype?

Back

A homozygous genotype has two identical alleles for a particular gene, such as BB or bb.

Front

What is a dominant allele?

Back

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

Front

What is a recessive allele?

Back

A recessive allele is an allele that is masked by the presence of a dominant allele and only expresses its trait when two copies are present.

Front

What is a phenotypic ratio?

Back

A phenotypic ratio is the ratio of different phenotypes in the offspring resulting from a genetic cross.

Front

What is a genotypic ratio?

Back

A genotypic ratio is the ratio of different genotypes in the offspring resulting 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 axial flowers (A) are dominant to terminal flowers (a), what is the probability of getting terminal flowers from a cross of Aa x Aa?

Back

The probability of getting terminal flowers (aa) is 1/4.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.