Unit 4 Genetics Retest Requirement

Front

What does heterozygous mean?

Back

An organism that has two different alleles for a trait, making it a hybrid.

Front

What is the probability of getting white fur from a cross of B (brown fur) and b (white fur)?

Back

50% chance of white fur.

Front

Define genetic variation.

Back

Genetic differences in a population or species.

Front

What is selective breeding?

Back

The process of breeding plants or animals for specific traits.

Front

What is the probability of producing heterozygous offspring from a cross of two heterozygous parents?

Back

50%.

Front

What is a Punnett square used for?

Back

To predict the genetic outcomes of a cross between two organisms.

Front

What does purebred mean?

Back

An organism that has identical alleles for a trait.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even if only one copy is present; recessive alleles require two copies to express their trait.

Front

Give an example of a trait that is influenced by multiple genes.

Back

Height in humans is influenced by multiple genes.

Front

What is the significance of a 25% probability in a genetic cross?

Back

It indicates that there is a one in four chance of a specific genotype occurring.