Genetics and Inheritance Review

What is the main reason offspring often look like their parents?

• They inherit traits from their parents

• They eat the same food as their parents

• They live in the same environment as their parents

• They copy their parents' behaviors

Answer explanation

Offspring often resemble their parents because they inherit traits from them through genes. This genetic inheritance determines physical characteristics, making the correct choice "They inherit traits from their parents."

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NGSS.MS-LS3-2

Why do some animals in a population have different fur colors?

• Genetic variation

• Diet differences

• Seasonal changes

• Environmental adaptation during life

Answer explanation

Genetic variation is the primary reason for different fur colors in a population. It results from mutations and recombination of genes, leading to diverse traits among individuals, unlike diet, seasonal changes, or environmental adaptations.

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NGSS.MS-LS4-4

What causes a baby elephant to inherit large ears?

• Genes passed from its parents

• The environment in which it grows up

• The food it eats as it grows

• Learning from its parents

Answer explanation

A baby elephant inherits large ears primarily due to genes passed from its parents. Genetic traits determine physical characteristics, including ear size, rather than environmental factors, diet, or learned behavior.

Tags

NGSS.MS-LS1-5

Why do siblings sometimes look different from each other?

• They inherit different combinations of genes from their parents

• They grow up in different environments

• They eat different diets

• They are exposed to different weather conditions

Answer explanation

Siblings can look different because they inherit different combinations of genes from their parents. Each child receives a unique mix of genetic material, leading to variations in appearance.

Tags

NGSS.MS-LS3-2

How are traits like eye color and hair color determined?

• By genes inherited from parents

• By the food eaten during growth

• By the amount of sunlight exposure

Answer explanation

Traits like eye color and hair color are determined by genes inherited from parents. These genes carry the information that dictates these physical characteristics, making this the correct choice.

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What determines whether a plant grows tall or short?

• Its genetic makeup. Genetics primarily determine plant height.

• The amount of fertilizer used. Fertilizer influences health, not genetics.

• The water available. Water affects growth rate, not genetic traits.

• The type of soil. Soil impacts nutrition, but not genetics.

Answer explanation

Plant height is primarily determined by its genetic makeup. While factors like fertilizer, water, and soil affect growth, they do not influence the genetic traits that dictate whether a plant grows tall or short.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS3-1

What is a trait?

• A characteristic that an organism inherits from its parents. Traits are passed genetically from parents to offspring.

• A behavior that an organism learns. Learned behaviors are not inherited traits.

• A change in an organism caused by the environment. Environmental changes affect behavior, not inherited traits.

• A skill an organism develops over time. Skills are learned, not inherited.

Answer explanation

A trait is a characteristic inherited from parents, distinguishing it from learned behaviors, environmental changes, or developed skills. The correct choice accurately defines traits as genetically passed from parents to offspring.

Tags

NGSS.MS-LS4-4

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Why do some birds have long beaks and others have short beaks?

• Genetic differences, Genetics determine beak length to suit food sources

• Learning from their parents, Traits are not learned

• Eating different foods, Food influences diet not inherited traits

• Growing up in different climates, Climate affects survival but not inherited traits

Answer explanation

Some birds have long beaks while others have short beaks due to genetic differences. Genetics determine beak length to suit specific food sources, allowing birds to adapt to their environments effectively.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS4-4

NGSS.MS-LS3-1

Why do two cats from the same litter look different?

• They inherited different traits from their parents, Genetic recombination creates variation

• They lived in different environments, Environment shapes behavior not genetics

• They ate different types of food, Diet does not influence inherited traits

• They were exposed to different amounts of sunlight, Sunlight does not affect genetic traits

Answer explanation

Cats from the same litter can look different because they inherit different traits from their parents. Genetic recombination during reproduction leads to variation in physical characteristics, even among siblings.

Tags

NGSS.MS-LS4-4

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How do flowers of the same species sometimes have different colors?

• Variation in genetic traits, Genetic differences cause variation in flower color

• Amount of water provided, Water impacts health not inherited traits

• The location where they are planted, Environment affects appearance temporarily

• The type of insects pollinating them, Pollinators do not change inherited traits

Answer explanation

Flowers of the same species can have different colors due to variation in genetic traits. Genetic differences lead to variations in flower color, making this the correct explanation.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS4-4