Genetics Flashcard Review

Front

What is a Punnett Square?

Back

A chart used to predict the genotypes of offspring from a genetic cross.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by alleles.

Front

What is a phenotype?

Back

The observable physical trait of an organism.

Front

What does heterozygous mean?

Back

Having two different alleles for a specific gene (e.g., Bb).

Front

What does homozygous mean?

Back

Having two identical alleles for a specific gene (e.g., BB or bb).

Front

What is an allele?

Back

Different forms of a gene that can exist at a specific locus.

Front

What is the genotypic ratio?

Back

The ratio of different genotypes produced in a genetic cross.

Front

What is the phenotypic ratio?

Back

The ratio of different phenotypes produced in a genetic cross.

Front

What is the role of the sticky foot gene in sea stars?

Back

It codes for a protein that makes the tube feet sticky.

Front

What is a dominant allele?

Back

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