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Genetics
Contributed by: Barron
  • 1. Genetics is a branch of biology that studies how traits, such as physical characteristics or diseases, are passed from one generation to the next. It involves the study of genes, which are segments of DNA that carry instructions for making proteins and ultimately determine an organism's characteristics. Genetics plays a crucial role in understanding inherited traits, genetic disorders, evolution, and even personalized medicine. Through the study of genetics, scientists are able to unlock the secrets of inheritance and explore the complexities of life at its most fundamental level.

    Which part of a cell contains the genetic material?
A) Cell membrane
B) Endoplasmic reticulum
C) Nucleus
D) Mitochondria
  • 2. What is a Punnett square used for?
A) To predict the genotypes of offspring from a genetic cross between two parents.
B) To determine the protein sequence of a gene.
C) To analyze the frequency of genetic mutations.
D) To study the molecular structure of DNA.
  • 3. Which scientist is known for discovering the structure of DNA?
A) Thomas Hunt Morgan
B) James Watson and Francis Crick
C) Gregor Mendel
D) Rosalind Franklin
  • 4. What is a recessive gene?
A) Genes that are located on the X chromosome.
B) Genes that are always dominant in an individual.
C) Genes that are only expressed when two copies are inherited.
D) Genes that skip a generation.
  • 5. Which term describes the presence of two different alleles for a gene in an individual?
A) Homologous
B) Monohybrid
C) Heterozygous
D) Homozygous dominant
  • 6. What is a pedigree used for in genetics?
A) To identify the total number of genes in an individual.
B) To create genetically modified organisms.
C) To trace the inheritance of traits in a family over several generations.
D) To determine the sequence of a specific gene.
  • 7. What is the purpose of meiosis in genetics?
A) To repair damaged DNA in cells.
B) To produce gametes (sex cells) with half the number of chromosomes.
C) To synthesize proteins for gene expression.
D) To generate genetic mutations.
  • 8. Which genetic disorder is characterized by the absence of pigment in the skin, hair, and eyes?
A) Sickle cell anemia
B) Cystic fibrosis
C) Albinism
D) Huntington's disease
  • 9. What is epigenetics?
A) The practice of gene therapy.
B) The process of genetic recombination.
C) The analysis of genetic mutations.
D) The study of changes in gene expression that do not involve changes to the DNA sequence.
  • 10. Which term refers to the proportion of individuals with a particular genotype that show the expected phenotype?
A) Penetrance
B) Plasmid
C) Chromatid
D) Genetic drift
  • 11. In classical genetics, what is a dihybrid cross?
A) A cross involving only one trait.
B) A cross between two homozygous individuals.
C) A genetic cross between two individuals that are both heterozygous for two traits.
D) A cross between individuals from different species.
  • 12. What is a somatic mutation?
A) A mutation that affects reproductive cells.
B) A mutation that involves the X chromosome.
C) A mutation that leads to cancer.
D) A mutation that occurs in a body (somatic) cell and is not passed on to offspring.
  • 13. Which term refers to the observable properties of an organism that result from genetic and environmental influences?
A) Aneuploidy
B) Phenotype
C) Genotype
D) Haploid
  • 14. What is the study of genes and heredity called?
A) Chemistry
B) Physics
C) Biology
D) Genetics
  • 15. How many chromosomes do humans typically have?
A) 23
B) 32
C) 64
D) 46
  • 16. Who is known as the 'Father of Genetics'?
A) Gregor Mendel
B) Thomas Edison
C) Charles Darwin
D) Louis Pasteur
  • 17. Which genetic disorder is characterized by an extra chromosome 21?
A) Sickle cell anemia
B) Huntington's disease
C) Cystic fibrosis
D) Down syndrome
  • 18. How many nitrogenous bases are there in DNA?
A) 5
B) 4
C) 3
D) 2
  • 19. Which genetic disorder is caused by a mutation in the CFTR gene?
A) Fragile X syndrome
B) Turner syndrome
C) Hemophilia
D) Cystic fibrosis
  • 20. Which technique is used to amplify a specific DNA sequence in genetics?
A) Western blot
B) Gel electrophoresis
C) Gene editing
D) PCR (Polymerase Chain Reaction)
  • 21. What is the term for alternate forms of a gene that can exist at a single locus?
A) Exons
B) Alleles
C) Mutations
D) Genomes
  • 22. Which term refers to a trait that is influenced by both genetic and environmental factors?
A) Dominant
B) Recessive
C) Multifactorial
D) X-linked
  • 23. Selective breeding is also known as:
A) Natural selection
B) Hybridization
C) Artificial selection
D) Genetic engineering
  • 24. What is a trait that is controlled by multiple genes known as?
A) Dominant
B) Monogenic
C) Recessive
D) Polygenic
  • 25. What is the process by which genetic material is passed from parent to offspring?
A) Genetic recombination
B) Heredity
C) Mutation
D) Cloning
  • 26. What type of inheritance pattern results in a blending of traits?
A) Codominance
B) Polygenic inheritance
C) Homozygous inheritance
D) Incomplete dominance
  • 27. A person with AB blood type has which of the following genotypes?
A) IBIB
B) ii
C) IAIB
D) IAIA
  • 28. What is the name of the process by which mRNA is made from a DNA template?
A) Replication
B) Transcription
C) Mutation
D) Translation
  • 29. What is the term for the likelihood that a specific event will occur?
A) Variability
B) Probability
C) Mutation rate
D) Frequency
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