Creating Phenotypes (M)

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., Dd, TT).

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype and environment.

Front

What does homozygous mean?

Back

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

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Dd or Hh).

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed in the phenotype even if only one allele is present, while recessive traits are expressed only when two recessive alleles are present.

Front

If green is recessive to blue, what does that imply about the alleles?

Back

It implies that the blue allele is dominant over the green allele.

Front

What is the genotype of an organism with a dominant phenotype?

Back

The genotype could be either homozygous dominant (e.g., BB) or heterozygous (e.g., Bb).

Front

What is the genotype of an organism with a recessive phenotype?

Back

The genotype must be homozygous recessive (e.g., bb).

Front

If a plant has the genotype Tt, what is its phenotype regarding height?

Back

The phenotype will be tall, as tall (T) is dominant over short (t).

Front

What does it mean if a trait is described as 'dominant'?

Back

It means that the trait will be expressed in the phenotype even if only one dominant allele is present.