Final Exam Review

Front

What is crossing-over and why is it important?

Back

Crossing-over is the exchange of genetic material between homologous chromosomes during meiosis. It is important because it is a source of genetic variation, leading to diverse traits in offspring.

Front

What parental cross will produce all heterozygous offspring?

Back

The parental cross BB x bb will produce all heterozygous offspring (Bb).

Front

What level of ecological organization is represented by a group of individuals of the same species?

Back

Population is the level of ecological organization that represents a group of individuals of the same species.

Front

What does phenotype refer to?

Back

Phenotype refers to the physical appearance of an individual, which is influenced by their genotype and environmental factors.

Front

How many protons are in one atom of Lithium (Li)?

Back

One atom of Lithium (Li) has 3 protons.

Front

What is meiosis?

Back

Meiosis is a type of cell division that reduces the chromosome number by half, resulting in four genetically diverse gametes.

Front

Define genotype.

Back

Genotype is the genetic makeup of an individual, consisting of the alleles inherited from their parents.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles are expressed in the phenotype even if only one copy is present, while recessive alleles are expressed only when two copies are present.

Front

What is an ecosystem?

Back

An ecosystem is a community of living organisms interacting with their physical environment.

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number of an element and contribute to the positive charge of the nucleus.