Genetics Quiz Review

Aa is an example of a ____________________ allele.

• Homozygous dominant

• Homozygous recessive

• Heterozygous

• Phenotype

How is it possible for an organism to have a recessive phenotype for a trait such as white flowers in pea plants?

• The organism inherits the recessive allele from one parent.

• The organism fails to inherit the alleles for the trait from either parent.

• The organism inherits the recessive allele from both parents.

• None of these

Which of the following best describes how you get your genes:

• Mitosis- binary fission

• Mitosis- budding

• Mitosis- fragmentation

• Meiosis- half from mom, half from dad

Which of the following alleles is homozygous recessive?

• aa

• AA

• Aa

• aA

A red flowered plant (RR) is crossed with a white flowered plant (WW) and produces plants with pink flowers (RW). If two pink flowered plants are crossed, what color offspring could be produced?

• red, white, and pink

• pink and red

• pink and white

• red and white

In humans, the allele for having a widow's peak is dominant to having a straight hairline. Many people do not like the widow's peak so they shave it off. Will this affect their offspring?

• No. Their offspring will have a widow's peak if they inherit both recessive alleles from the parents.

• Yes. There is no chance the offspring will be born with a widow's peak because the parents destroyed the trait.

• No. Shaving the widow's peak does not change their genotype, so the allele can still be passed on to offspring.

• Yes. Offspring born with a widow's peak will have a smaller peak because the allele was damaged.

Which statement MOST accurately describes the influences on a person’s length of life and quality of life?

• Genes alone determine both the length and quality of life.

• Behaviors alone determine both the length and quality of life.

• Both behaviors and genes influence the length and quality of life.

• Neither genes nor behaviors influence the length or quality of life.

Which scenario is an example of a physical characteristic of an organism that was influenced by environmental factors?

• The pumpkin seeds were relatively flat and white.

• The black cat's eyes were a bright green color.

• A baby was born with ten fingers and ten toes.

• The bark of a tree was scarred (damaged) after a beaver gnawed it.

If a black chicken breeds with a white chicken and their offspring (baby) has black and white feathers, what is this an example of?

• Pedigree

• Incomplete Dominance

• Codominance

• Full-dominance

Based off of the karyotype diagram, what biological sex is does this person’s chromosomes say they are?

• Male

• Female

• What?! Chromosomes don't determine a person's biological sex!