Intro Genetics Review

Front

What are factors that control traits called?

Back

Genes.

Front

True or False: A hybrid is the offspring of parents that have different alleles for a trait.

Back

True.

Front

In Mendel's experiments, what proportion of the plants in the F2 generation had a trait that had been absent in the F1 generation?

Back

One fourth.

Front

What could have caused the purple horns?

Back

A mutation.

Front

True or False: A Punnett square shows all the possible combinations of alleles in parents.

Back

False.

Front

What is a gene?

Back

A segment of DNA that determines a specific 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 a phenotype?

Back

The observable characteristics or traits of an organism.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by alleles.