Unit 4 Genetics Retest Requirement

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, making the organism a hybrid.

Front

What is selective breeding?

Back

Selective breeding is the process of choosing specific plants or animals to reproduce based on desired traits.

Front

What is the allele combination for a hybrid organism?

Back

Aa (one dominant allele and one recessive allele).

Front

What are recessive alleles?

Back

Recessive alleles are represented by lowercase letters and only express their traits when two copies are present.

Front

What does homozygous mean?

Back

Homozygous means having two identical alleles for a particular gene, also known as purebred.

Front

What is a dominant allele?

Back

A dominant allele is represented by a capital letter and can mask the effect of a recessive allele.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their traits even when only one copy is present, while recessive alleles require two copies to express their traits.

Front

What is an example of a trait that can be selectively bred in chickens?

Back

Traits such as egg production, size, or feather color can be selectively bred in chickens.

Front

What does purebred mean?

Back

Purebred refers to an organism that has two identical alleles for a specific trait.

Front

What is the significance of allele combinations in genetics?

Back

Allele combinations determine the traits expressed in an organism, influencing its phenotype.