Interactive Life Science

Each organism has 2 alleles for a particular trait. Where do these two alleles come from?

• One from each parent

• Both from one parent

• Alleles do not come from parents

• The kidney

Tags

NGSS.MS-LS3-2

A male heterozygous for widow’s peak marries a female without a widow’s peak.

Widow’s peak is a dominant trait (H) not having a widow’s peak is recessive (h).

Use the Punnett Square on Widow's Peal to answer the following question:

What percent of the children will have widow's peak?

• 25%

• 50%

• 75%

• 100%

The brown eye trait is dominant over blue eyes. Which of the following genotypes best represents the phenotype for blue eyes?

• BB

• Bb

• bb

• bB

Tags

NGSS.HS-LS3-1

Which genotype below represents a homozygous trait?

• Aa

• AA

• aA

A tapeworm lives in human intestines, absorbing the nutrients that would normally be absorbed by the person. This eventually causes the person health problems. The relationship between the tapeworm and the human is -

• parasite/host

• predator/prey

• herbivore/omnivore/omnivore

• consumer/producer

Yucca flowers are pollinated by yucca moths. The moths lay their eggs in the flowers where the larvae hatch and eat some of the developing seeds. Both species benefit. 

• parasitism

• commensalism

• mutualism

Tags

NGSS.MS-LS2-2

Black walnut trees produce and release a chemical from their roots that prevents nearby plants of different species from growing. Which statement describes the MOST LIKELY advantage (good thing) for the black walnut tree releasing this chemical?

• Less sunlight is needed to produce food.

• Walnuts are protected from animal predators.

• Competition for space and nutrients is decreased.

• The amount of air available to the tree increases.

Answer explanation

When the Black walnut trees release that chemical, other plants have a hard time growing in that area. When that happens, the Black walnut tree gets all the resources (water, minerals, light) in that area. They don't have to compete with any other plants.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Name the symbiotic relationship shown in the image.

• mutualism

• commensalism

• parasitism

Tags

NGSS.MS-LS2-2

The three types of symbiotic relationships are:

• Mutualism, commenalism, pariatism

• Prey, predator, producer

• Parasitism, mutism, commonism

• What are symbiotic relationships?

Tags

NGSS.MS-LS2-2

A hitched thumb is a recessive trait. A person with a hitched thumb would have a genotype of?

• BB

• Bb

• bb

• bB

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2