Unit 8 Bellringer Quiz (2023-2024)

In a certain species of mouse, coat color is determined by a single gene. The alleles for coat color are B, which codes for brown fur, and b, which codes for white fur. If a mouse displays the dominant trait for coat color, what would be its phenotype?

• Bb

• bb

• brown

• white

Tags

NGSS.HS-LS3-1

The gene for black fur in guinea pigs is dominant over the gene for white fur. What is the percent chance of having an offspring with white fur in a cross between a black guinea pig and a white guinea pig (Bb x bb)?

• 25%

• 50%

• 75%

• 100%

In guinea pigs, an allele for rough fur (R) is dominant over an allele for smooth fur (r), and an allele for black coat (B) is dominant over an allele for white fur (b). What would be the genotype of a guinea pig with smooth black fur?

• RR, BB

• RR, Bb

• rr, bb

• rr, BB

In humans, the presence of dimples is dominant over a lack of dimples. If a person without dimples (dd) and a person with dimples (Dd) have children, what can be concluded about the genotypes for the offspring?

• There is a 75% chance that the offspring will have dimples.

• There is a 25% chance that the offspring will not have dimples.

• There is a 50% chance the offspring will be dd and a 50% chance they will be Dd.

• There is a 50% chance the offspring will be DD and a 50% chance they will be dd.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

The white-tailed deer is found in the temperate forests of the United States and southern Canada. Its fur color changes from reddish-brown to gray-white, and the texture changes from a solid, thin, short hair undercoat to a long, thick, hollow hair. A scientist observes that this change occurs in regular intervals. Which feature of temperate forests has led to these adaptations in white-tailed deer?

• large diversity of deer species

• large diversity of plants and grasses to eat

• hot summers and harsh, cold winters

• variations in precipitation rates

Tags

NGSS.MS-LS1-5

NGSS.MS-LS4-4

A cross is carried out between two pea plants. One of the pea plants is tall and has yellow-colored seeds, and the other pea plant is short and has green-colored seeds. All of the offspring obtained from the cross are tall and have yellow-colored seeds. Which combination represents the dominant traits from the cross of the pea plants?

• tall and yellow-colored seeds

• short and green-colored seeds

• tall and green-colored seeds

• short and yellow-colored seeds

The gender of an American alligator is determined by the temperature at which the egg incubates. A temperature of 34°C and higher produces male offspring, while a temperature closer to 30°C produces female offspring. Which statement best explains gender determination in American alligator offspring?

• The gender of the offspring is determined to keep an even number of males and females in the American alligator population.

• The gender of the offspring is determined to ensure a large number of mature females in the American alligator population.

• The gender of the offspring is determined as a result of environmental and not genetic factors.

• The gender of the offspring is determined as a result of genetic and not environmental factors.

Tags

NGSS.MS-LS1-5

The graph shows the number of fungi that grows in two different conditions. In the first condition, the fungi grow in isolation on a Petri dish, while in the second condition, the fungi grow on a plant. What can be concluded from the data?

• The number of fungi decreases in the presence of more food.

• The number of fungi decreases in the presence of light.

• The number of fungi increases when the fungi are in contact with other organisms.

• The number of fungi increases when the fungi are grown in sterile laboratory conditions.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Study the diagram. Based on the diagram, which statement is true?

• Genes are made up of chromosomes.

• Chromosomes contain a single gene.

• Centromeres hold instructions for how to make proteins.

• Genes are present on chromosomes and control traits in an individual.

Tags

NGSS.MS-LS4-4

An animal is born with a random mutation that results in larger than normal ears for its species. As a result, the animal is able to hunt both small and large prey. How can this mutation be best described?

• The mutation has a beneficial effect since the animal’s ability to survive increases.

• The mutation has a neutral effect since the animal still relies on hunting to gain food.

• The mutation has a harmful effect since the animal has a harder time attracting mates.

• The mutation has a harmful effect since the animal’s ability to see decreases.

Tags

NGSS.MS-LS3-1

NGSS.MS-LS4-4