Inheritance and Variation in Biology Quiz
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Questions and Answers

What is the basic unit of heredity?

  • Allele
  • Nucleotide
  • Gene (correct)
  • Chromosome

What is the term for the genetic makeup of an organism?

  • Genotype (correct)
  • Homozygous
  • Phenotype
  • Heterozygous

Which scientist is known as the 'Father of Genetics'?

  • Gregor Mendel (correct)
  • Thomas Hunt Morgan
  • Charles Darwin
  • Alfred Wallace

What is the law that states each pair of alleles segregates independently of each other pair of alleles during gamete formation?

<p>Law of Independent Assortment (D)</p> Signup and view all the answers

Which of the following is a characteristic of an autosomal recessive disorder?

<p>It skips generations (A)</p> Signup and view all the answers

What term describes the phenomenon in which one gene influences multiple, seemingly unrelated phenotypic traits?

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

Flashcards

Basic unit of heredity

A gene is the basic unit of heredity, carrying the instructions for a specific trait.

Genetic makeup

The genotype is an organism's complete genetic makeup, the set of genes it carries.

Father of Genetics

Gregor Mendel is considered the Father of Genetics for his work on pea plants and the laws of inheritance.

Independent Assortment

The law of independent assortment states that each pair of alleles segregates independently during gamete formation.

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Autosomal recessive trait

An autosomal recessive disorder skips generations, appearing only when two copies of a mutated gene are inherited.

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Pleiotropy

Pleiotropy is when one gene affects multiple traits.

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Study Notes

Basic Unit of Heredity

  • The basic unit of heredity is a gene.
  • Genes are segments of DNA that code for specific traits.

Genetic Makeup

  • The term for the genetic makeup of an organism is genotype.
  • Genotype refers to the specific combination of alleles an organism possesses.

Father of Genetics

  • Gregor Mendel is known as the "Father of Genetics".
  • Mendel conducted groundbreaking experiments with pea plants, laying the foundation for our understanding of inheritance.

Law of Independent Assortment

  • The law of independent assortment states that each pair of alleles segregates independently of other pairs during gamete formation.
  • This means that the inheritance of one trait does not influence the inheritance of another trait.

Autosomal Recessive Disorders

  • Autosomal recessive disorders are characterized by the need for two copies of the recessive allele for the disorder to be expressed.
  • These disorders often skip generations and are more likely to appear among siblings

Pleiotropy

  • Pleiotropy describes the phenomenon where a single gene influences multiple, seemingly unrelated phenotypic traits.
  • This means that a mutation in a single gene can lead to a range of diverse effects on an organism's appearance, physiology, and behavior.

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Description

Test your knowledge of inheritance and variation in biology with this quiz! Answer questions about the basic unit of heredity, the genetic makeup of organisms, and the scientist known as the 'Father of Genetics.'

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