Dominant and Recessive Traits

Front

What is a dominant trait?

Back

A dominant trait is a genetic trait that is expressed in the phenotype even when only one copy of the allele is present.

Front

What is a recessive trait?

Back

A recessive trait is a genetic trait that is only expressed in the phenotype when two copies of the allele are present.

Front

What is the genotype for a dominant phenotype?

Back

The genotype for a dominant phenotype can be either homozygous dominant (e.g., TT) or heterozygous (e.g., Tt).

Front

What is the genotype for a recessive phenotype?

Back

The genotype for a recessive phenotype is homozygous recessive (e.g., tt).

Front

If a black phenotype is recessive, what is its genotype?

Back

The genotype for a black phenotype, if it is recessive, is bb.

Front

What are the possible genotypes for round seeds if round is dominant over wrinkled?

Back

The possible genotypes for round seeds are homozygous dominant (RR) and heterozygous (Rr).

Front

What does the genotype Gg represent?

Back

The genotype Gg represents a dominant phenotype because it contains one dominant allele (G).

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype refers to the observable traits or characteristics.

Front

What is an allele?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., TT or tt).