Genetics Review Flashcard

Front

What is the term for the genetic makeup of an organism?

Back

Genotype

Front

What is the term for the specific combination of alleles an organism has for a particular gene?

Back

Genotype

Front

What is the physical trait of an organism? (e.g., tall pear plant, eye color)

Back

Phenotype

Front

What is the predicted outcome when a homozygous normal fruit fly (e+ e+) is crossed with a homozygous ebony fruit fly (ee)?

Back

All the offspring will have brownish-yellow bodies.

Front

What does homozygous recessive mean?

Back

It refers to having two identical recessive alleles for a trait, represented as 'aa'.

Front

What is an allele?

Back

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

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the physical expression of traits.

Front

What does it mean if an organism is homozygous?

Back

It means that the organism has two identical alleles for a specific gene.

Front

What does it mean if an organism is heterozygous?

Back

It means that the organism has two different alleles for a specific gene.

Front

What is a dominant trait?

Back

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