SC.7.L.16.1- Heredity/Genetics

What is a genotype?

• A genotype is the physical appearance of an organism.

• A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

• A genotype is the environment in which an organism lives.

• A genotype is the process of genetic mutation.

What is a phenotype?

• The genetic makeup of an organism.

• The observable physical or biochemical characteristics of an organism, determined by its genotype.

• The process by which organisms adapt to their environment.

• The evolutionary history of a species.

What is heredity?

• The process of evolution over generations.

• The passing of traits from parents to offspring through genes.

• The study of how organisms interact with their environment.

• The ability of an organism to adapt to its surroundings.

What does heterozygous mean?

• Having two identical alleles for a particular gene (e.g., AA)

• Having two different alleles for a particular gene (e.g., Aa)

• Having one allele for a gene and no other allele

• Having three different alleles for a particular gene

What is a purebred organism?

• A purebred organism has a homozygous genotype, meaning it has identical alleles for a trait.

• A purebred organism has a heterozygous genotype, meaning it has different alleles for a trait.

• A purebred organism is a hybrid of two different species.

• A purebred organism can have any combination of alleles for a trait.

What is the purpose of a test cross?

• To determine the genotype of an organism with a dominant phenotype by crossing it with a homozygous recessive organism.

• To identify the phenotype of an organism by crossing it with a homozygous dominant organism.

• To assess the environmental impact on an organism's phenotype.

• To evaluate the genetic diversity within a population.

What is a recessive trait?

• A trait that is expressed when at least one dominant allele is present.

• A trait that is only expressed when two recessive alleles are present.

• A trait that can be expressed in either homozygous or heterozygous conditions.

• A trait that is always expressed regardless of the alleles present.

What is a hybrid organism?

• A hybrid organism has a heterozygous genotype, meaning it has different alleles for a trait.

• A hybrid organism is a purebred with identical alleles for a trait.

• A hybrid organism is a genetically modified organism with altered DNA.

• A hybrid organism is an organism that can reproduce asexually.

What are alleles?

• Different types of chromosomes that determine genetic traits.

• Different forms of a gene that determine specific traits.

• The physical location of a gene on a chromosome.

• The process by which traits are passed from parents to offspring.

What does homozygous mean?

• Having two identical alleles for a particular gene (e.g., AA or aa).

• Having two different alleles for a particular gene (e.g., Aa).

• Having one allele for a gene and no allele for another gene.

• Having multiple alleles for a single gene.