STAAR Review Part 3

Which of these describes a difference between a virus and a cell?

• cells contain protein, viruses only contain carbohydrates

• viruses have flagella, cells have cilia

• cells reproduce independently, viruses require a host cell to replicate

• viruses have a protein membrane, cells have membranes made of nucleic acids

In cattle the allele for cloven hooves (H) is dominant over the allele for mule-foot hooves (h). The phenotype for each trait is shown in this picture.

What is the probability of cloven hooves in the offspring of parents that are heterozygous for the trait?

• 25%

• 50%

• 75%

• 100%

Viruses are...

• prokaryotic

• eukaryotic

• non-living

• endospores

Viruses

• are made of cells

• are misfolded proteins

• are a protein coat around genetic material

• are endospores

What are the main function of the surface markers on the outside of the virus?

• They aid in respiration

• they help the virus grow

• they help the virus invade its host by attaching to specific sites on the host

• they help the virus digest food molecules

Which of the following alleles is homozygous recessive?

• Tt

• tt

• TT

• t

Which of the following is a phenotype?

• Aa

• red hair

• heterozygous

• mutated DNA

G = green, g = yellow. The genotype for a yellow plant is...

• GG

• Gg

• gg

• all of the choices are correct

What gamete possibilities could come from this parent's genotype: AaBB

• AB, AB, aB, aB

• Ab, AB, Ab, ab

• Ab, Ab, Ab, Ab

• AB, aB, ab, aB

What goes in box 3?

• Aabb

• AABB

• AAbb

• aaBb