OL Genetics Flashcard #1 Review

Front

What does a Punnett square show?

Back

All the possible outcomes of a genetic cross.

Front

What is an organism’s physical appearance called?

Back

Phenotype.

Front

What are segments of DNA that carry genetic instructions for a specific trait called?

Back

Gene.

Front

What is the genotype of a mouse with the alleles bb?

Back

Homozygous.

Front

What does the notation tt mean to genetics?

Back

Two recessive alleles.

Front

What is the definition of genotype?

Back

The genetic makeup of an organism, represented by alleles.

Front

What is the definition of phenotype?

Back

The observable physical characteristics of an organism.

Front

What does homozygous mean?

Back

Having two identical alleles for a specific gene.

Front

What does heterozygous mean?

Back

Having two different alleles for a specific gene.

Front

What is codominance?

Back

A genetic scenario where both alleles in a heterozygote are fully expressed.