6.2.1 Variation

• What does variation refer to?

  Differences between individuals
• Mutations are changes in DNA sequences that contribute to genetic variation.

  True
• Match the type of variation with its cause:

  Genetic Variation ↔️ Mutations

  Environmental Variation ↔️ Nutrition
• What environmental factor can lead to skin tanning?

  Climate
• Variation is caused by both genetic and environmental factors
• Continuous variation is influenced by many genes and environmental factors.


  True
• Discontinuous variation is typically controlled by one or a few genes
• Sexual reproduction leads to genetic recombination and random assortment of chromosomes.


  True
• What environmental factor can affect plant height?

  Nutrition
• Match the type of variation with its description:

  Continuous Variation ↔️ Occurs on a spectrum

  Discontinuous Variation ↔️ Occurs in distinct categories
• Environmental variation can result from differences in nutrition, climate, toxins, or living conditions
• What are the key differences between genetic and environmental variation?

  Origin, causes, inheritance
• What is an example of a genetic trait?

  Eye color
• Variation can be caused by both genetic and environmental factors
• What is the main cause of genetic variation during sexual reproduction?

  Genetic recombination
• Order the factors that contribute to genetic variation:

  1️⃣ Mutations

  2️⃣ Sexual reproduction

  3️⃣ Gene flow
• Environmental variation can be passed on to offspring.

  False
• What is an example of continuous variation?

  Height
• What is an example of discontinuous variation?

  Blood type
• What is the term for changes in DNA sequences that contribute to genetic variation?

  Mutations
• Gene flow refers to the exchange of genes between populations
• Environmental variation is inherited by offspring.

  False
• What causes genetic variation during sexual reproduction?

  Genetic recombination
• Genetic variation can be passed on to offspring.

  True
• Environmental variation can lead to differences in traits like plant height or skin tanning
• Mutations are changes in DNA sequences that contribute to genetic variation.


  True
• Environmental variation is caused by environmental rather than genetic factors
• Skin tanning and pigmentation are examples of environmental variation caused by climate
• What is environmental variation primarily influenced by?

  Specific environmental conditions
• What is the origin of genetic variation?

  Differences in genes
• Genetic variation refers to differences in DNA sequences among individuals.
• Mutations in DNA sequences can cause genetic variation.


  True
• Match the genetic trait with its possible variations:

  Eye color ↔️ Blue, green, brown

  Blood type ↔️ A, B, AB, O

  Hair color ↔️ Blonde, red, brown, black
• Why is variation essential for natural selection?

  Provides raw material for selection
• What is the primary outcome of populations adapting to different environments?

  Reproductive isolation
• Survival during environmental changes is enhanced by resistance to diseases in some individuals.

  True
• What are the two types of variation that contribute to population adaptations?

  Genetic and environmental
• Environmental variation allows individuals to adjust their characteristics to maximize fitness.


  True
• Match the data collection method with its example:

  Observational Studies ↔️ Measuring student heights

  Experimental Studies ↔️ Growing plants in different soil
• Why is representative sampling important when studying variation?

  Captures full diversity