Genes and Alleles

Front

What is a dominant allele?

Back

A dominant allele is expressed in the phenotype whether there is one or two copies present.

Front

What is a recessive allele?

Back

A recessive allele is only expressed in the phenotype if the organism has two copies of that allele.

Front

What does phenotype refer to?

Back

Phenotype refers to the observable expression of a trait in an organism.

Front

What is a genotype?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses.

Front

What is an allele?

Back

An allele is a version or variation of a gene that can determine a specific trait.

Front

What is the relationship between alleles and traits?

Back

Alleles are variations of genes that determine specific traits in an organism.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

What is the significance of the letter 'B' in genetics?

Back

In genetics, letters like 'B' represent alleles, where 'B' could denote a dominant allele (e.g., black fur in mice).

Front

What is the difference between phenotype and genotype?

Back

Phenotype is the observable trait, while genotype is the genetic makeup that determines that trait.