Gene Genius: The Ultimate Genetics Review

What is the shape of DNA?

• A) A straight line

• B) A double helix ✅

• C) A square

• D) A zig-zag

Answer explanation

The correct shape of DNA is a double helix, which resembles a twisted ladder. This structure is essential for its function in storing and transmitting genetic information.

Why do children sometimes look like their parents?

• Because they copy their parents' style

• Because they inherit traits from their parents through DNA ✅

• Because they live in the same house

• Because they eat the same food

Answer explanation

Children look like their parents because they inherit traits from them through DNA. This genetic inheritance determines physical characteristics such as eye color, hair type, and other features.

If a brown-eyed parent (Bb) has a child with a blue-eyed parent (bb), what are the chances the child has blue eyes?

• 0%

• 25%

• 50%

• 100%

Answer explanation

The brown-eyed parent (Bb) can pass either B or b, while the blue-eyed parent (bb) can only pass b. The possible combinations are Bb (brown eyes) and bb (blue eyes). Thus, there's a 50% chance for each, leading to a 25% chance for blue eyes.

A dominant trait always shows up if at least one parent passes it down. True or False?

• True

• False

Answer explanation

True. A dominant trait will express itself in the offspring if at least one parent carries the dominant allele, making it visible in the phenotype.

Sometimes, a change (mutation) happens in a gene. How might this affect an animal or person?

• It can cause a genetic disorder.

• It has no effect at all.

• It always improves the organism.

• It only affects future generations.

Answer explanation

A mutation in a gene can disrupt normal biological functions, potentially leading to genetic disorders. This highlights the importance of the correct choice, as not all mutations are beneficial or neutral.

Who is known as the "Father of Genetics" for studying how traits are passed down?

• A) Charles Darwin

• B) Gregor Mendel

• C) Albert Einstein

• D) Rosalind Franklin

Answer explanation

Gregor Mendel is known as the "Father of Genetics" for his pioneering work on inheritance patterns in pea plants, establishing the foundational principles of heredity.

If a red-flowered plant (RR) is crossed with a white-flowered plant (WW) and the flowers have red and white spots, what kind of inheritance is this?

• A) Codominance

• B) Normal Inheritance

• C) Recessive Inheritance

• D) Mutations

Answer explanation

The red and white spotted flowers indicate that both alleles (RR and WW) are expressed equally, which is characteristic of codominance. In codominance, neither allele is dominant, resulting in a phenotype that shows both traits.

This game highlights what topic in genetics?

• The role of DNA in inheritance

• The process of genetic mutation

• The concept of genetic drift

• The importance of genetic diversity

Answer explanation

This game emphasizes the role of DNA in inheritance, illustrating how genetic information is passed from parents to offspring, which is fundamental to understanding genetics.

If a mutation changes a cell how does this affect the organism?

• A mutation is always bad for the organism.

• A mutation is always good for the organism.

• A mutation may be good or bad to the organism.

Answer explanation

A mutation can have varying effects on an organism. It may be beneficial, harmful, or neutral depending on the context and environment, making the correct choice "A mutation may be good or bad to the organism."

What is the primary function of DNA in living organisms?

• To protect against diseases

• To store genetic information

• To transport nutrients

• To provide energy

Answer explanation

The primary function of DNA in living organisms is to store genetic information, which is essential for growth, development, and reproduction. This information is passed from one generation to the next.