Genetics Review

Front

How many alleles are needed to code for a specific trait?

Back

Two alleles are needed to code for a specific trait.

Front

What does a Punnett square show in genetics?

Back

A Punnett square shows the possible genetic combinations from a cross between two parents.

Front

What is incomplete dominance?

Back

Incomplete dominance is when the hybrid condition produces a new phenotype, often referred to as 'blending'.

Front

What is the physical expression of the genetic material of an organism called?

Back

The physical expression of the genetic material is called the phenotype.

Front

Which genotype is homozygous dominant?

Back

The genotype YY is homozygous dominant.

Front

What is a genotype?

Back

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

Front

What is a phenotype?

Back

A phenotype is the observable characteristics or traits of an organism.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait, while heterozygous means having two different alleles.

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even in the presence of a recessive allele.

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present.