Question 1

Which of the following statements best describes the theory of epigenesis as proposed by William Harvey in the 1600s?

Accepted Answer

It proposes that an organism develops from a fertilized egg through a series of developmental events, transforming the egg into an adult.

Question 2

Louis Pasteur's experiments disproved which widely held belief about the origin of life?

Accepted Answer

Spontaneous generation

Question 3

According to Mendel's findings, how are traits passed from parents to offspring?

Accepted Answer

Traits are passed through a pair of genes that separate during gamete formation.

Question 4

Which of the following best defines an allele?

Accepted Answer

An alternate form of a gene.

Question 5

A mutation in the gene encoding the $\beta$-globin protein changes the DNA sequence from CTC to CAC. What is the resulting effect at the protein level, and what disease does this cause?

Accepted Answer

The amino acid glutamic acid is replaced by valine, causing sickle-cell anemia.

Question 6

Which of the following statements about the structure of DNA is correct?

Accepted Answer

DNA is a double helix composed of nucleotides with deoxyribose sugars and complementary base pairing (A=T, G=C).

Question 7

Which of the following best describes the central dogma of molecular genetics?

Accepted Answer

DNA is transcribed into RNA, which is then translated into protein.

Question 8

Which of the following is NOT a function of proteins in the cell?

Accepted Answer

Carrying genetic information from one generation to the next.

Question 9

The Chromosome Theory of Inheritance, formulated by Sutton and Boveri, states that:

Accepted Answer

Genes are located on chromosomes and are transmitted through gametes, ensuring genetic continuity.

Question 10

Which experiment provided the first solid evidence that DNA, and not protein, is the genetic material in bacteria?

Accepted Answer

Avery, MacLeod, and McCarty's experiment in 1944.

Question 11

Which of the following is a direct application of recombinant DNA technology in agriculture?

Accepted Answer

Introducing genes for herbicide resistance into crops to create transgenic plants.

Question 12

A scientist wants to study a human neurological disorder by transferring the relevant human gene into a model organism. Which of the following organisms would be most appropriate for this genetic study?

Accepted Answer

Mus musculus (mouse)

Question 13

Which of the following is NOT a typical characteristic of a model organism used in genetic studies?

Accepted Answer

Long life cycle

Question 14

Which of the following best describes the process used to clone Dolly the sheep?

Accepted Answer

Transfer of the nucleus from an adult cell into an egg cell with its nucleus removed.

Question 15

Which of the following is a real-world example of how a single nucleotide mutation can affect phenotype?

Accepted Answer

A change from GAG to GUG in the $\beta$-globin gene leads to sickle-cell anemia.

Question 16

Which of the following is NOT a potential ethical issue raised by advances in genetics?

Accepted Answer

The use of restriction enzymes to cut DNA at specific sites.

Question 17

Which of the following best explains why model organisms such as Drosophila melanogaster and Mus musculus are valuable in genetic research?

Accepted Answer

They have short life cycles, are easy to grow, produce many offspring, and allow for straightforward genetic analysis.

Question 18

Which of the following statements about meiosis is correct?

Accepted Answer

Meiosis results in gametes that have half the number of chromosomes (haploid, n) compared to the parent cell.

Question 19

Which of the following is a correct pairing of a model organism and its primary use in genetic studies?

Accepted Answer

Saccharomyces cerevisiae (yeast): Used to study basic cellular processes and eukaryotic genetics.

Question 20

A researcher is using restriction endonucleases and vectors to insert a human gene into bacteria for mass production of a therapeutic protein. Which field of genetics does this research best represent?

Accepted Answer

Recombinant DNA technology

Introduction to Genetics: Foundations, Molecular Biology, and Applications

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