REVIEW - Inheritance of traits

What is the genotype of heterozygous green?

• GG

• Gg

• gg

• GgG

Which of the following is a genotype of Brown eyes dominant trait?

• bb

• Bb

• Bb or BB

• BB or Bb

What is a recessive trait?

• A trait that is only expressed in the phenotype when two copies of the allele are present.

• A trait that is always expressed in the phenotype regardless of the allele combination.

• A trait that can be expressed in the phenotype with just one copy of the allele.

• A trait that is never expressed in the phenotype.

Father of Genetics

• Gregor Mendel

• Charles Darwin

• Louis Pasteur

• James Watson

The transfer of traits from parents to offspring

• Heredity

• Evolution

• Genetics

• Mutation

What is an allele?

• A type of chromosome that determines physical traits.

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

• A protein that helps in cell division.

• A type of mutation that occurs in DNA.

What is a phenotype?

• The genetic makeup of an organism.

• The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.

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

• The study of how organisms interact with their environment.

The study of heredity and variations

• Genetics

• Biology

• Chemistry

• Physics

What is a homozygous genotype?

• A genotype consisting of two identical alleles for a particular gene.

• A genotype consisting of two different alleles for a particular gene.

• A genotype that is not expressed in the phenotype.

• A genotype that results from a mutation in a single allele.

What is the role of DNA in inheritance?

• DNA is responsible for the physical appearance of an organism.

• DNA carries the genetic information that is passed from parents to offspring.

• DNA helps in the digestion of food in living organisms.

• DNA is involved in the production of energy within cells.