Complete and Incomplete Dominance

Front

What is the definition of incomplete dominance?

Back

Incomplete dominance is a genetic situation in which one allele does not completely dominate another allele, resulting in a new phenotype that is a blend of the two traits.

Front

What does the term 'genotype' refer to?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses for a particular trait.

Front

What is the definition of phenotype?

Back

Phenotype is the physical expression or characteristics of a trait in an organism, determined by its genotype.

Front

What does 'heterozygous' mean?

Back

Heterozygous refers to having two different alleles for a specific gene, such as 'Rr'.

Front

What does 'homozygous' mean?

Back

Homozygous refers to having two identical alleles for a specific gene, such as 'RR' or 'rr'.

Front

What is codominance?

Back

Codominance is a genetic scenario where both alleles in a heterozygous organism contribute to the phenotype, resulting in both traits being expressed equally.

Front

In a cross between a red flowered plant (RR) and a white flowered plant (WW) showing incomplete dominance, what will be the phenotype of the offspring?

Back

The offspring will have pink flowers (RW), as the traits blend.

Front

What is the expected phenotype ratio in a monohybrid cross of two heterozygous parents (Rr x Rr)?

Back

The expected phenotype ratio is 3:1, with 3 showing the dominant trait and 1 showing the recessive trait.

Front

What is the expected genotype ratio in a monohybrid cross of two heterozygous parents (Rr x Rr)?

Back

The expected genotype ratio is 1:2:1, with 1 homozygous dominant (RR), 2 heterozygous (Rr), and 1 homozygous recessive (rr).

Front

If a trait is dominant, what does that mean?

Back

A dominant trait is one that will be expressed in the phenotype even if only one copy of the allele is present.