Genetics Unit Test

Answer 1

Sure! Here are some sample questions that might be found on a genetics unit test, covering various topics such as Mendelian genetics, DNA structure, gene expression, and inheritance patterns. You can adapt them based on your specific curriculum.

Genetics Unit Test

Section 1: Multiple Choice

1. What is the basic unit of heredity? a) Protein
   b) RNA
   c) Chromosome
   d) Gene

2. In a dihybrid cross between two heterozygous parents (YyRr x YyRr), what is the expected phenotypic ratio of the offspring? a) 9:3:3:1
   b) 1:2:1
   c) 3:1
   d) 1:1

3. Which of the following statements about DNA is true? a) DNA is made up of amino acids.
   b) DNA is a double helix structure.
   c) RNA is a double helix structure.
   d) DNA contains uracil.

4. What is the process by which messenger RNA (mRNA) is synthesized from a DNA template? a) Translation
   b) Replication
   c) Transcription
   d) Transformation

5. Which type of inheritance pattern is characterized by one allele being completely dominant over another? a) Incomplete dominance
   b) Codominance
   c) Complete dominance
   d) Polygenic inheritance

Section 2: Short Answer

6. Define Mendel's Law of Segregation and provide an example of how it applies to an organism.

7. Describe the structure of DNA and the function of its components.

8. Explain the difference between genotype and phenotype.

Section 3: Problem Solving

9. In pea plants, the allele for tall plants (T) is dominant over the allele for short plants (t). If a heterozygous tall plant is crossed with a homozygous short plant, what is the probability of producing a short plant?

10. A mother is a carrier for a sex-linked trait (Xᴬ) and the father does not have the trait (Xʏ). What are the possible genotypes of their male and female offspring? Provide a Punnett square to support your answer.

Grading Rubric

• Multiple Choice: 1 point for each correct answer.
• Short Answer: Up to 3 points for clarity, accuracy, and completeness of the answer.
• Problem Solving: Up to 5 points for process, accuracy of calculation, and presentation of the solution.

---

Feel free to use or modify these questions according to your specific needs! Would you like to discuss any particular topic within genetics or need assistance with answers?