Core 3 Quiz #1

Which of the following is an example of a biological trait?

• personality
• hair style
• eye color
• regional accent

When Mendel crossed plants that were purebred purple-flowered with plants that were purebred white-flowered, the resulting offspring all had purple flowers. When allowed to self-pollinate, this F1 generation gave rise to white-flowered plants as well as purple. As a result, Mendel determined that individual traits are

•  inherited as discrete units.
• diluted in offspring.
•  merged with successive generations.
• lost in the pollination process.

Which of the following conclusions was a result of Mendel’s observations?

• Organisms that give rise to purebreds are genetically superior.
• Organisms that have intermediate features are self-pollinating.
• Organisms inherit two copies of each gene, one from each parent.
• Organisms that self-pollinate do not have "either-or" features.

Hair color and eye color are examples of a person’s

• recessive traits.
• dominant alleles
• genotype
• phenotype

When an organism has two alleles at a particular locus that are different, the organism is called

• purebred
• dominant
• heterozygous
• recessive

If a pea plant were homozygous recessive for height, how would its alleles be represented?

• Tt
• TT
• tt
• tT

An allele is dominant in a heterozygote when it is

• expressed and the other allele is not.
• a very common allele in a population.
• the stronger of the two alleles.
• more desirable than the other allele.

What do the letters inside the grid of a Punnett square represent?

• phenotypes of parents.
• genotypes of offspring.
• testcrosses of offspring.
• chromosomes of parents.

What is the probability that the offspring of a cross between a homozygous recessive parent and a heterozygous parent will be homozygous recessive?

• 1/1
• 1/2
• 1/4
• 1/8

What is the phenotypic ratio of a monohybrid cross between two heterozygous parents? 

• 3:1
• 1:2:1
• 9:3:3:1
• 1:2:2:1