Genetics Review

What is a chromosome?

• A chromosome is a long strand of DNA wrapped around proteins, containing many genes.

• A chromosome is a small particle that carries oxygen in the blood.

• A chromosome is a type of protein that helps in muscle contraction.

• A chromosome is a cellular structure that produces energy for the cell.

What is a gene?

• A segment of DNA that contains the instructions for building a specific protein.

• A type of RNA that helps in protein synthesis.

• A molecule that carries genetic information from one generation to the next.

• A structure within a cell that produces energy.

How many pairs of chromosomes do humans have?

• 20 pairs

• 22 pairs

• 23 pairs

• 24 pairs

What is a recessive allele?

• An allele that expresses its trait only when two copies are present.

• An allele that always expresses its trait regardless of the other allele.

• An allele that can mask the expression of another allele.

• An allele that is only found in males.

What is a dominant allele?

• An allele that expresses its trait only when two copies are present.

• An allele that expresses its trait even when only one copy is present.

• An allele that is always recessive in its expression.

• An allele that has no effect on the phenotype.

What is a mutation?

• A change in the DNA sequence that can lead to changes in traits.

• A process of cell division that results in two identical cells.

• An environmental factor that causes changes in an organism's behavior.

• A type of genetic engineering used to create new species.

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 a type of mutation in DNA.

What is heredity?

• The process of acquiring knowledge through experience.

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

• The study of how organisms interact with their environment.

• The method by which organisms adapt to their surroundings.

What are the different variations of a gene?

• Chromosomes

• Genotypes

• Alleles

• Phenotypes

What is genetic variation?

• Genetic variation refers to the differences in DNA among individuals in a population.

• Genetic variation is the process by which organisms become more similar over time.

• Genetic variation is the study of how genes are inherited from parents to offspring.

• Genetic variation refers to the physical characteristics of an organism.