Genetic Terms - Practice

Front

What is a homozygous recessive genotype?

Back

A homozygous recessive genotype consists of two identical recessive alleles, represented as 'rr'.

Front

What is the phenotype for a genotype Bb?

Back

The phenotype for the genotype Bb is brown fur, as brown (B) is dominant over pink (b).

Front

What is a homozygous genotype for brown fur?

Back

The homozygous genotype for brown fur is 'BB', which means both alleles are dominant.

Front

What is an allele?

Back

An allele is a different form of a gene that can exist at a specific locus on a chromosome.

Front

What is a phenotype?

Back

A phenotype is the physical appearance or observable characteristics of an organism.

Front

What does it mean if an organism is homozygous?

Back

An organism is homozygous if it has two identical alleles for a particular gene.

Front

What does it mean if an organism is heterozygous?

Back

An organism is heterozygous if it has two different alleles for a particular gene.

Front

What is the difference between dominant and recessive alleles?

Back

A dominant allele masks the effect of a recessive allele in a heterozygous genotype.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genetic outcomes of a cross between two organisms.

Front

What is the genotype for pink fur if brown fur (B) is dominant?

Back

The genotype for pink fur is 'bb', which is homozygous recessive.