ESSENTIALS OF GENETICS 10TH EDITION
2026 STUDY GUIDE QUESTIONS AND
ANSWERS GRADED A+
⩥ What was the Theory of Preformation?
Answer: that the fertilized egg contains a complete miniature adult
- called a homunculus (add water, grows)
⩥ Who coined the term "cell" and why?
Answer: Robert Hook, examined plants under microscope and the
structures looked like mini jail cells.
⩥ What theory did Schleiden and Schwann propose?
Answer: The cell theory (1830)
- all organisms are composed of basic structural units called cells
⩥ What did Louis Pasteur disprove?
Answer: Spontaneous generation (life from nonliving matter)
- meat in flask closed off no growth, meat in flask exposed growth,
something must be in the air not the meat itself
, ⩥ What book did Darwin publish in 1859 and what ideas did it put
forth?
Answer: The Origin of Species
1. descent with modification
2. natural selection
⩥ What does "descent with modification" mean?
Answer: Species change over time and modern species came from
ancestral species.
⩥ What is natural selection?
Answer: the core mechanism of evolution where organisms better
adapted to their environment are more likely to survive, reproduce, and
pass advantageous, heritable traits to their offspring, gradually changing
populations over generations
⩥ What was Mendel's contribution to biology?
Answer: worked with peas and used quantitative data to show:
1. traits are passed from generation to generation
2. transmission of genetic information from parents to offspring
- his work forms the foundation of genetics
⩥ What is genetics?
2026 STUDY GUIDE QUESTIONS AND
ANSWERS GRADED A+
⩥ What was the Theory of Preformation?
Answer: that the fertilized egg contains a complete miniature adult
- called a homunculus (add water, grows)
⩥ Who coined the term "cell" and why?
Answer: Robert Hook, examined plants under microscope and the
structures looked like mini jail cells.
⩥ What theory did Schleiden and Schwann propose?
Answer: The cell theory (1830)
- all organisms are composed of basic structural units called cells
⩥ What did Louis Pasteur disprove?
Answer: Spontaneous generation (life from nonliving matter)
- meat in flask closed off no growth, meat in flask exposed growth,
something must be in the air not the meat itself
, ⩥ What book did Darwin publish in 1859 and what ideas did it put
forth?
Answer: The Origin of Species
1. descent with modification
2. natural selection
⩥ What does "descent with modification" mean?
Answer: Species change over time and modern species came from
ancestral species.
⩥ What is natural selection?
Answer: the core mechanism of evolution where organisms better
adapted to their environment are more likely to survive, reproduce, and
pass advantageous, heritable traits to their offspring, gradually changing
populations over generations
⩥ What was Mendel's contribution to biology?
Answer: worked with peas and used quantitative data to show:
1. traits are passed from generation to generation
2. transmission of genetic information from parents to offspring
- his work forms the foundation of genetics
⩥ What is genetics?
