7.2 Mendel & Heredity

Front

What is the phenotypic ratio of a monohybrid cross between two heterozygous black bears (B-black, b-brown)?

Back

3:1

Front

A trait that is the result of many genes is an example of a ____________ trait.

Back

polygenic

Front

State Mendel's principle of dominance.

Back

Mendel's principle of dominance states that some alleles are dominant and others are recessive.

Front

What type of cross was Mendel’s experiment?

Back

Complete dominance

Front

Codominance is neither dominant nor recessive; it shows a 3rd phenotype. True or False?

Back

True

Front

What is a dominant allele?

Back

An allele that expresses its trait even when paired with a recessive allele.

Front

What is a recessive allele?

Back

An allele that only expresses its trait when paired with another recessive allele.

Front

What does homozygous mean?

Back

Having two identical alleles for a particular gene.

Front

What does heterozygous mean?

Back

Having two different alleles for a particular gene.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by alleles.