Unit 9 - Topic 1 | Introduction to Mendelian Genetics

Multiple Choice

Why did Mendel choose pea plants for his experiments?

• They are slow to grow and hard to breed.

• They have many traits that are easy to observe and can self-pollinate.

• They have only one trait.

• They mutate quickly.

Multiple Choice

What is the difference between a genotype and a phenotype?

• Genotype is the physical appearance; phenotype is the genetic makeup.

• Genotype is inherited traits only from the mother.

• Genotype is the genetic makeup; phenotype is the physical appearance.

• Genotype is the traits you choose to display.

Multiple Choice

If two heterozygous green pea plants (Gg) are crossed, what percentage of their offspring are expected to be yellow?

• 0%

• 25%

• 50%

• 75%

Multiple Choice

What does the Law of Segregation state?

• Genes are linked together forever.

• Traits are blended from both parents.

• Only dominant traits are passed to offspring.

• Organisms inherit one allele randomly from each parent for each trait.

Multiple Choice

How is incomplete dominance different from codominance?

• In incomplete dominance, both traits fully show separately.

• In codominance, traits blend together. In incomplete dominance both traits show individually

• In codominance, no traits are visible.

• In incomplete dominance, traits blend together, while in codominance, both traits show separately.

Multiple Choice

Artificial selection has produced many vegetables from the same ancestral plant. What does this show about traits?

• Traits are fixed and cannot change.

• Selective breeding can emphasize different traits over time.

• Only physical appearance can change.

• Genes mutate randomly without any human influence.

Match

Match the term to the definition:

• Genetic makeup

• Specific copy of a gene

• Physical expression of a trait

• Diagram to predict offspring traits

• Two identical alleles for a gene

Genotype

Allele

Phenotype

Punnett Square

Homozygous

• Genotype

• Allele

• Phenotype

• Punnett Square

• Homozygous

Match

Match the term to the definition:

• A characteristic of a living thing (such as eye color or height)

• Having two different alleles for a trait

• An allele that is expressed even if only one copy is present

• An allele that is only expressed when two copies are present

• A specific sequence of DNA that codes for a trait

Trait

Heterozygous

Dominant

Recessive

Gene

• Trait

• Heterozygous

• Dominant

• Recessive

• Gene