Biology Review Spring 2023

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 F 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.

• 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.

Which phrase best describes the term genome?

• the genetic makeup of a chromosome

• the genes that make up an organism

• the location of a specific set of genes

• the sum of an organism's physical traits

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

• reccessive traits.

• dominant alleles.

• genotype.

• phenotype.

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

• purebreed.

• dominant.

• heterozygous.

• reccessive

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

The term for a cross that involves just one trait, such as pod shape, is called a

• homozygous cross.

• test cross.

• monohybrid cross.

• dihybrid cross.