3.3.1 Types of Variation

• What type of variation is height considered?

  Continuous
• Continuous variation is measured in categories.

  False
• Environmental variation is inherited from parents.

  False
• Continuous variation includes traits like height and weight.


  True
• Genetic variation is acquired during an individual's lifetime.

  False
• Genetic variation is essential for species adaptability.


  True
• Match the genetic trait with its genetic basis and variation pattern:

  Eye color ↔️ Multiple genes, continuous

  Blood type ↔️ Different alleles, discontinuous

  Hair texture ↔️ Different gene combinations, continuous
• Continuous variation forms a bell-shaped curve
• What causes genetic variation in traits?

  Differences in genes
• What is an example of a trait influenced by environmental variation?

  Muscle tone
• On what is continuous variation measured?

  A scale
• What determines eye color in humans?

  Multiple genes
• What is the genetic basis of blood type variation?

  Different alleles
• Nutrition, temperature, and exposure to toxins are examples of environmental factors that cause environmental variation.
• Match the cause of genetic variation with its explanation and impact:

  Mutation ↔️ Changes in DNA sequence, introduces new alleles

  Genetic Recombination ↔️ Mixing of genetic material during meiosis, creates new combinations of alleles

  Gene Flow ↔️ Transfer of genes between populations, enhances genetic diversity
• What is the primary cause of genetic variation?

  Differences in genes
• What environmental factor affects skin color due to tanning?

  Sun exposure
• Muscle tone is an example of a trait affected by environmental variation.


  True
• Mutations are changes in the DNA sequence
• Mutations introduce new alleles
• Climate, nutrition, and exposure to toxins are examples of environmental
• What are the two main types of variation in populations?

  Continuous and discontinuous
• Match the type of variation with its characteristic:

  Continuous Variation ↔️ Forms a bell-shaped curve

  Discontinuous Variation ↔️ Measured in categories
• Environmental variation is inherited from parents.

  False
• Variation refers to the differences between individuals of the same species
• What is an example of a trait showing discontinuous variation?

  Blood type
• Environmental variation is caused by differences in the individual's environment
• Discontinuous variation results in traits with distinct values
• Discontinuous variation does not form a bell-shaped curve
• Blood type in humans is categorized into A, B, O, and AB
• Eye color is an example of a genetic trait that shows continuous variation.
• What environmental factor affects skin color variation?

  Sun exposure
• Continuous variation is measured in categories.

  False
• Match the type of variation with its cause and examples:

  Genetic Variation ↔️ Differences in genes, eye color

  Environmental Variation ↔️ Differences in environment, muscle tone
• What is environmental variation caused by?

  Differences in environment
• What are three factors that can cause environmental variation?

  Nutrition, temperature, toxins
• Crossing over during meiosis leads to genetic recombination.


  True
• Match the cause of genetic variation with its explanation:

  Mutation ↔️ Changes in DNA sequence

  Genetic Recombination ↔️ Mixing of genetic material

  Gene Flow ↔️ Transfer of genes between populations
• The type and amount of nutrients consumed can affect growth rate and body size.


  True
• Height is an example of a trait that exhibits continuous