Genetics Intro

Front

What is a person's phenotype?

Back

The physical expression of the gene.

Front

What does 'Aa' represent in genetics?

Back

Heterozygous.

Front

What is a segment of DNA on a chromosome that codes for a specific trait?

Back

Gene.

Front

What term describes an organism’s physical appearance or visible traits?

Back

Phenotype.

Front

How is an allele for a dominant trait represented?

Back

By capital letters.

Front

What is the difference between genotype and phenotype?

Back

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

Front

What is a homozygous genotype?

Back

A genotype consisting of two identical alleles for a particular trait.

Front

What is a dominant allele?

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

What is a recessive allele?

Back

An allele that only expresses its trait when two copies are present.

Front

What is the purpose of a Punnett square?

Back

To predict the genotypes and phenotypes of offspring from a genetic cross.