Genetics

Front

What is a heterozygous genotype?

Back

A heterozygous genotype consists of two different alleles for a particular gene, such as Bb.

Front

What is the genotypic ratio in a monohybrid cross between two heterozygous plants?

Back

The genotypic ratio is 1:2:1.

Front

What does the term 'genotypic ratio' refer to?

Back

The genotypic ratio refers to the ratio of homozygous dominant, heterozygous, and homozygous recessive offspring in a genetic cross.

Front

What is a homozygous recessive genotype?

Back

A homozygous recessive genotype consists of two identical recessive alleles, such as bb.

Front

What is a recessive allele?

Back

A recessive allele is an allele whose trait only shows up when no dominant allele is present.

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 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.

Front

What is the phenotypic ratio in a monohybrid cross between two heterozygous plants?

Back

The phenotypic ratio is 3:1.

Front

Define homozygous dominant genotype.

Back

A homozygous dominant genotype consists of two identical dominant alleles, such as BB.

Front

What is the purpose of a test cross?

Back

A test cross is used to determine the genotype of an individual with a dominant phenotype by crossing it with a homozygous recessive individual.