Unit 4 Genetics Retest Requirement

Front

What is selective breeding?

Back

Selective breeding is the process by which humans choose specific organisms with desirable traits to reproduce, aiming to enhance those traits in future generations.

Front

Give an example of selective breeding.

Back

Crossing a Labrador with a Poodle to create a Labradoodle is an example of selective breeding.

Front

What is the role of humans in selective breeding?

Back

Humans choose individuals with desirable traits to parent the next generation.

Front

What is a dominant trait?

Back

A dominant trait is a genetic trait that is expressed in the phenotype even when only one copy of the allele is present. For example, yellow pea seeds are a dominant trait.

Front

What does heterozygous mean?

Back

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

Front

What are genotypes?

Back

Genotypes are the genetic makeup of an organism, represented by alleles such as BB, Bb, and bb.

Front

What is a phenotype?

Back

Phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a gene, while heterozygous means having two different alleles.

Front

What is the significance of dominant and recessive traits?

Back

Dominant traits can mask the presence of recessive traits in the phenotype, meaning that only one dominant allele is needed for the trait to be expressed.

Front

What is hybridization in genetics?

Back

Hybridization is the process of crossing two different species or varieties to produce offspring with traits from both parents.