Download 3-1 WKST - Home [www.petoskeyschools.org]

Name _______________________________________________ Date ________________ HOUR______________
Section 3-1: Mendel and His Peas (p. 56)
4. You don’t look exactly like anyone else, unless you are anidentical twin. Why do you think that is true?
_____________________________________________________________________________________________
_____________________________________________________________________________________________
Why Don’t You Look Like a Rhinoceros? (p. 56)
5. How does heredity explain why you don’t look like a rhinoceros?
_____________________________________________________________________________________________
_____________________________________________________________________________________________
Who Was Gregor Mendel? (p. 56)
6. In the garden of a monastery, Gregor Mendel studied how traits are passed from __________________________
to __________________________.
Unraveling the Mystery (p. 57)
7. Mendel noticed that
a. all of the parents’ traits can be seen in their offspring.
b. only plants have traits that don’t appear in some generations.
c. sometimes a trait will not appear in a generation.
d. all traits appear in every generation.
8. What is a “self-pollinating” plant?
_____________________________________________________________________________________________
Peas Be My Podner (p. 58)
Mark each of the following statements True or False.
9. _________Mendel chose to study several traits at one time to get as much information as possible.
10. _________In Figure 4, wrinkled and round are the two traits shown for the characteristic of seed shape.
11. _________If it self-pollinates, a tall true-breeding plant can produce short offspring.
12. _________In cross-pollination, a plant’s anthers are removed and it is fertilized with pollen from another plant.
Mendel’s First Experiment (p. 59)
13. Look at Figure 6. What happened when Mendel crossed plants that had round seeds with plants that had
wrinkled seeds?
_____________________________________________________________________________________________
_____________________________________________________________________________________________
14. For each characteristic, Mendel called the trait that always appeared ______________________and the trait that
seemed to disappear ______________________.
Mendel’s Second Experiment (p. 59)
15. When the first generation of plants was allowed to self-pollinate, as shown in Figure 6,
a. all of the offspring had the recessive trait.
b. some of the offspring had the recessive trait.
c. all of the offspring had the dominant trait.
d. the first-generation plants could not produce offspring.
A Different Point of View (p. 60)
16. Mendel counted the number of plants with each trait in the ______________________ generation.
17. Take a minute to read the Math Break on page 60. In the table of Mendel’s results, the dominant-to-recessive
ratio for each trait is
a. about 1 : 3.
c. about 1 : 2.
b. about 3 : 1.
d. about 2 : 1.
A Brilliant Idea (p. 61)
Choose the term in Column B that best matches the phrase in Column A, and write the corresponding letter in the
space provided.
22. Look at Figure 8 on page 62. What combinations of alleles will result in plants with purple flowers?
_____________________________________________________________________________________________
_____________________________________________________________________________________________
What Are the Chances? (p. 62)
23. Offspring are more likely to inherit either of their alleles for each trait from the mother. True or False?
24. The probability that you would toss two heads in a row with a coin is __________________percent.
SECTION 3-1 Vocabulary
In your own words, write a definition for each of the following terms in the space provided.
1.heredity
_____________________________________________________________________________________________
_____________________________________________________________________________________
2. dominant trait
_____________________________________________________________________________________________
_____________________________________________________________________________________________
3. recessive trait
_____________________________________________________________________________________________
_____________________________________________________________________________________________
4. genes
_____________________________________________________________________________________________
_____________________________________________________________________________________________
5. alleles
_____________________________________________________________________________________________
_____________________________________________________________________________________________
6. genotype
_____________________________________________________________________________________________
_____________________________________________________________________________________________
7. phenotype
_____________________________________________________________________________________________
_____________________________________________________________________________________________
8. probability
_____________________________________________________________________________________________
_____________________________________________________________________________________________
HOW ARE GENES AND ALLELES RELATED TO GENOTYPE AND PHENOTYPE?
_____________________________________________________________________________________________
_____________________________________________________________________________________________