Review Genetics

What is the difference between homozygous and heterozygous?

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

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

• Homozygous refers to a single allele for a trait, while heterozygous refers to two alleles of the same type.

• Homozygous and heterozygous are terms that describe the same genetic condition.

What is a Punnett square?

• A diagram used to predict the genetic outcomes of a cross between two organisms.

• A tool for measuring the height of plants.

• A method for calculating the age of fossils.

• A chart for organizing different species of animals.

What is a homozygous recessive allele?

• A homozygous recessive allele consists of two identical dominant alleles, such as 'AA'.

• A homozygous recessive allele consists of one dominant and one recessive allele, such as 'Aa'.

• A homozygous recessive allele consists of two identical recessive alleles, such as 'bb'.

• A homozygous recessive allele consists of two different alleles, such as 'Ab'.

What is heredity?

• The process of acquiring knowledge through experience.

• The passing down of traits from parents to their children.

• The study of how living organisms interact with their environment.

• The method by which organisms adapt to their surroundings.

What is a genotype?

• The physical appearance of an organism

• The genetic makeup of an organism, represented by alleles such as 'AA', 'Aa', or 'aa'.

• The environment in which an organism lives

• The process of cell division in organisms

What does it mean for an organism to be purebred?

• A purebred organism has ancestors that are all of the same breed or variety, resulting in homozygous alleles.

• A purebred organism has a mix of different breeds, leading to heterozygous alleles.

• A purebred organism is one that has been genetically modified for specific traits.

• A purebred organism is one that can reproduce with any other organism regardless of breed.

What is an allele?

• A type of chromosome that determines physical traits.

• A variant form of a gene that can produce different traits.

• A process of cell division that leads to genetic variation.

• A type of mutation that occurs in DNA sequences.

What is the role of genes in heredity?

• Genes are segments of RNA that carry hereditary information.

• Genes are segments of DNA that carry hereditary information and determine traits.

• Genes are proteins that determine physical characteristics.

• Genes are molecules that only affect behavior.

What is the purpose of studying genetics?

• To understand the chemical composition of DNA.

• To learn about the history of biological research.

• Studying genetics helps us understand inheritance, variation, and the biological basis of traits.

• To explore the effects of environmental factors on organisms.

What does it mean for a trait to be recessive?

• A recessive trait is expressed only when one copy of the recessive allele is present (e.g., 'Tt').

• A recessive trait is expressed only when two copies of the recessive allele are present (e.g., 'tt').

• A recessive trait is always expressed regardless of the allele combination.

• A recessive trait is expressed when it is paired with a dominant trait.