Mendelian Genetics Review

Front

What is the definition of homozygous dominant?

Back

A genotype consisting of two identical dominant alleles (e.g., AA).

Front

What is the definition of homozygous recessive?

Back

A genotype consisting of two identical recessive alleles (e.g., aa).

Front

What is the definition of heterozygous?

Back

A genotype consisting of two different alleles (e.g., Aa).

Front

What is required to express a recessive trait?

Back

Two lower-case letters (e.g., aa).

Front

What is an allele?

Back

An alternative form of a gene (e.g., G or g).

Front

What does the term genotype refer to?

Back

The genetic makeup of an organism (e.g., AA, Aa, or aa).

Front

What does the term phenotype refer to?

Back

The observable characteristics or traits of an organism (e.g., flower color).

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous genotypes.

Front

What is a Punnett square used for?

Back

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

Front

What is the principle of segregation?

Back

During gamete formation, the two alleles for a trait separate from each other.