Unit 4 : Genetics - Flashcard 1

Front

What are alleles?

Back

Different versions of a gene that determine specific traits.

Front

What does purebred mean?

Back

The offspring of many generations that have the same traits.

Front

What is a homozygous dominant genotype?

Back

A genotype with two identical dominant alleles, e.g., NN.

Front

What is a heterozygous genotype?

Back

A genotype with one dominant and one recessive allele, e.g., Bb.

Front

What allele is expressed in a heterozygous genotype?

Back

The dominant allele.

Front

What is a recessive allele?

Back

An allele that is masked by the presence of a dominant allele.

Front

What is a trait?

Back

A characteristic or feature of an organism, such as height or color.

Front

What is the difference between genotype and phenotype?

Back

Genotype is the genetic makeup, while phenotype is the physical appearance.

Front

What is a gene?

Back

A segment of DNA that codes for a specific trait.

Front

What does it mean for an organism to be homozygous?

Back

Having two identical alleles for a particular gene.