Genetics and Heredity Quiz

Test Your Knowledge of Genetics

DNA Scientists
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1. An organism's expressed physical traits, such as hair color or shape, are called its ____ .

2. What is an allele?

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3. An organism that has two different alleles for a single trait is said to be _____ for that trait.

Heredity in Dogs. Gandee Vasan/Getty Images

4. In this type of inheritance, one allele for a specific trait is not completely expressed over its paired allele.

A pink snapdragon flower exhibits incomplete dominance inheritance.. Copyright Crezalyn Nerona Uratsuji/Getty Images

5. If red flower color (R) is dominant and white (r) recessive, a plant with white flowers would have a genotype of ___ .

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6. In a dihybrid cross, organisms differ in how many traits?

7. In a dihybrid cross, what is the expected ratio in the F2 generation?

8. A cross between true-breeding green and yellow plants (green pea color is dominant) results in ...

Green & Yellow Split Peas. Joy Skipper/Getty Images

9. Which principle states that allele pairs separate independently during the formation of gametes?

The male gametes (sperm) are approaching a female gamete (an unfertilized egg) prior to conception.. Credit: Science Picture Co/Subjects/Getty Images

10. In X chromosome linked recessive traits, the phenotype is ___ .

Conceptual representation of the X and Y chromosomes of a human male. Here the Y chromosome (at right) has been altered in shape and size to appear much larger and more Y-shaped than it really is.. DEPT. OF CLINICAL CYTOGENETICS, ADDENBROOKES HOSPITAL/Getty Images

Genetics and Heredity Quiz

You got: % Correct. Excellent!

I got Excellent!. Genetics and Heredity Quiz
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Wow, that's a great score! It is clear that you are a diligent worker and you put in the effort to understand genetics concepts. I encourage you to continue to investigate the world of genetics by learning about gene mutations, genetic variation, genetic recombination, and the genetic code.

Have you ever wondered how genes code for proteins? Discover the steps of DNA transcription and protein synthesis. For more genetics information, look into the processes of DNA replication, the cell cycle, and the differences between mitosis and meiosis.

Genetics and Heredity Quiz

You got: % Correct. Way to Go!

I got Way to Go!. Genetics and Heredity Quiz
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Good job. You have shown that you have a basic understanding of genetics, however there is still room of improvement. You can brush up on genetics subjects by becoming familiar with Mendel's law of segregation, independent assortment, concepts of genetic dominance, polygenic inheritance, and sex-linked traits.

Did you know that freckles and dimples are features that are the result of gene mutations? Discover more about genetics by investigating gene mutations, sex chromosomes, and chromosome mutations.

Genetics and Heredity Quiz

You got: % Correct. Try Again!

I got Try Again!. Genetics and Heredity Quiz
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It's Okay. So you didn't do as well as you had hoped. With a little more studying and practice you will have genetics concepts down. Study up on Mendels law of segregation, independent assortment, concepts of genetic dominance, polygenic inheritance, and sex-linked traits.

Genetics is truly an exciting subject. It explains why we look like our parents, why women live longer than men, and why some people have freckles and dimples.