Download Chapter 11 (Sections 1-3

Chapter 11 (Sections 1-3 - Genetics) Key Terms
DIRECTIONS: For each word below, write the definition from Chapter 11 in your
book (starts on page 260) on the lines provided.
GENETICS ______________________________________________________________
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TRAIT ______________________________________________________________
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GENE –
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ALLELE ______________________________________________________________
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GAMETE ______________________________________________________________
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HOMOZYGOUS ______________________________________________________________
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HETEROZYGOUS ______________________________________________________________
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PHENOTYPE ______________________________________________________________
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GENOTYPE ______________________________________________________________
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CODOMINANCE ______________________________________________________________
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INCOMPLETE DOMINANCE ______________________________________________________________
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MULTIPLE ALLELES ______________________________________________________________
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POLYGENIC TRAIT ______________________________________________________________
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Vocabulary Review
Matching In the space provided, write the letter of the definition that best matches each
term.
____
1. gene
____
2. genetics
____
3. homozygous
____
4. hybrid
a. offspring of crosses between parents
with different traits
b. scientific study of heredity
c. chemical factor that decides traits
d. having two identical alleles for a
particular trait
Matching In the space provided, write the letter of the definition that best
matches each term.
_____ 5. phenotype
_____ 6. probability
_____ 7. Punnett square
_____8.
trait
a. likelihood something will happen
b. specific characteristic, such as seed
color, that varies from one individual
to another
c. diagram used to show what gene
combinations may result from a
genetic cross
d. physical characteristics of an
organism
Dominance
Mendel’s principle of dominance states that some alleles are dominant and others
are recessive. An organism with a dominant allele will show the dominant form of
the trait. An organism will only express the recessive form of a trait when a
dominant allele is not present.
In the space provided, fill in the genotype of the offspring. The first one has been
done for you.
Dominant and Recessive Forms of Pea Plant Traits
Trait
Offspring
Parent Plants (P Generation)
(F1 Generation)
Seed Color
Yellow
YY
Green
yy
Yellow
Yy
Seed Coat Color
White
gg
Gray
GG
Gray
Pod Shape
Constricted
ss
Smooth
SS
Smooth
Pod Color
Green
CC
Yellow
cc
Green
Plant Height
Tall
TT
Short
tt
Use the table to answer the questions. Circle the correct answer.
1. What is the dominant shape of a pea pod?
constricted
smooth
2. What is the recessive color of a pea plant’s seed coat?
white
gray
Tall
NAME: ____________________________________
FOUNDATIONS
DATE: __________________