Codominance & Incomplete Dominance

Front

What is codominance in genetics?

Back

Codominance is a genetic scenario in which both alleles in a heterozygous individual contribute equally and visibly to the organism's phenotype.

Front

What is incomplete dominance in genetics?

Back

Incomplete dominance is a genetic scenario where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

Front

In a Punnett Square, what does a 100% probability of an offspring being purple indicate?

Back

It indicates that all offspring will express the dominant phenotype when both parents are either homozygous dominant or heterozygous for the dominant trait.

Front

What is the genotype of a homozygous dominant individual?

Back

The genotype of a homozygous dominant individual is represented as 'YY'.

Front

What is the genotype of a heterozygous individual?

Back

The genotype of a heterozygous individual is represented as 'Aa', where 'A' is the dominant allele and 'a' is the recessive allele.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

How can you determine the probability of an offspring's phenotype using a Punnett Square?

Back

By filling out the Punnett Square with the alleles of the parents and calculating the ratio of each phenotype in the resulting offspring.

Tags

NGSS.HS-LS3-3

Front

What is the phenotypic ratio of a monohybrid cross between two heterozygous individuals (Aa x Aa)?

Back

The phenotypic ratio is 3:1, where 3 offspring will show the dominant phenotype and 1 will show the recessive phenotype.

Front

What is the significance of the term 'allele'?

Back

An allele is a variant form of a gene that can produce different traits or phenotypes in an organism.

Tags

NGSS.HS-LS3-1

Front

What does it mean for an organism to be homozygous?

Back

An organism is homozygous when it has two identical alleles for a particular gene, either dominant or recessive.

Front

What is the difference between dominant and recessive alleles?

Back

A dominant allele is expressed in the phenotype even when only one copy is present, while a recessive allele is only expressed when two copies are present.