Biology Chapter 11 Quiz

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Questions and Answers

What is a primary focus of study in chapter 11 of biology class 12?

  • Human anatomy and physiology
  • Cell structure and function
  • Genetic variation and heredity (correct)
  • Ecological interactions among species

Which process describes the transfer of genetic information from parents to offspring?

  • Genetic drift
  • Recombination
  • Evolution
  • Heredity (correct)

Which term refers to the physical expression of genetic traits?

  • Chromosome
  • Genotype
  • Allele
  • Phenotype (correct)

What type of inheritance involves traits governed by multiple genes?

<p>Polygenic inheritance (B)</p> Signup and view all the answers

Which of the following is NOT a mechanism of genetic variation?

<p>Stabilizing selection (C)</p> Signup and view all the answers

Flashcards

Genetic Variation and Heredity

Differences in DNA among individuals, and the passing of traits from parents to offspring.

Heredity

The process where genetic information is passed from parents to their offspring, ensuring continuity of traits across generations.

Phenotype

The observable physical or biochemical characteristics of an organism, resulting from the interaction of its genotype with the environment.

Polygenic Inheritance

Traits that are controlled by multiple genes, each with a small additive effect, leading to a continuous range of phenotypes.

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Stabilizing selection

A type of natural selection in which genetic diversity decreases and the population mean stabilizes on a particular trait value.

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Study Notes

Inheritance and Variation

  • Chapter 11 of Biology class 12 focuses on inheritance and variation.
  • Inheritance describes the transfer of genetic information from parents to offspring.
  • Phenotype refers to the physical expression of genetic traits.
  • Polygenic inheritance involves traits governed by multiple genes.
  • Gene flow is NOT a mechanism of genetic variation.

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