Name______________________________

Period_____

5.7 Guided Reading

Exceptions to Mendel’s Rules

As you carefully read through the text, answer the following questions as completely as possible!

Exceptions to Mendel’s Rules

1. In all of Mendel’s experiments, he worked with traits where a _____________ gene controlled the trait. But this is not always true.

Incomplete Dominance

2. One allele is _______ always dominant over another allele.

3. What is incomplete dominance? Describe an example. Explain.

Codominance and Multiple Alleles

4. What is codominance? Describe an example. Explain.

Polygenic Traits

5. What are polygenic traits? Explain.

Sex-Linked Traits

6. Sex-linked inheritance refers to the inheritance of traits located on genes on the ________ chromosomes.

7. Since males and females do not have the same sex chromosomes, there will be differences between sexes in how these sex-linked traits are __________________.

8. Why are boys much more likely to be colorblind than girls? Explain.

9. Why are females often carriers for colorblindness? Explain.

Asexual Reproduction

10. In asexual reproduction, there is only __________ parent and an ___________ copy of the parent’s DNA is passed onto the offspring. As a result, the offspring are ________________ of the parent.

11. A clone is an organism that has __________________ DNA to another individual.

Review

12. Summarize the seven points listed.