Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Genetics
Work-Alikes
In the space provided, write the letter of the term or phrase that best describes
how each numbered item functions.
_____ 1. true-breeding
a. a musician who continues to play
the same song
b. different versions of the same
story
c. feeding food to someone else
d. predicting the outcome of a coin
toss
e. feeding food to yourself
f. a baseball player’s batting
average
_____ 2. self-fertilization
_____ 3. cross-pollination
_____ 4. probability
_____ 5. alleles
_____ 6. ratio
Cause and Effect
In the space provided, write the letter of the term or phrase that best matches each
cause or effect given below.
Cause
7. _________________
8. _________________
9. P generation cross
10. _________________
11. test cross
12. _________________
13. _________________
Effect
a. a defective
hemoglobin
heterozygous condition
b. garden pea plant for
small, matures quickly,
heredity studies
produces many offspring
c. mutated genes
____________________________________________________________
d. alleles of a particular
genetic disorder
gene are different
__________________
e. genotype of
dominant individual
determined
sickle cell anemia
f. F1 generation
white fur in winter
g. pigment gene does
not work in cold
temperatures
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science: Biology
20
Genetics
Name ______________________________ Class __________________ Date __________________
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science: Biology
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Genetics
Name ______________________________ Class __________________ Date __________________
Genetics continued
Linkages
In the spaces provided, write the letters of the two terms or phrases that are linked together
by the term or phrase in the middle. The choices can be placed in any order. Some choices
may be used more than once.
14. ______ use of mathematics ______
a. heterozygous condition
b. recessive allele
c. separation during meiosis
d. P
e. Mendel’s experimentation
f. two alleles for different traits
g. blending of traits
h. unknown probability of a genetic
cross
i. sex-linked trait
j. science of genetics
k. known probability of genetic cross
l. F2
15. ______ F1 ______
16. ______ law of independent ______
assortment
17. ______ multiply two separate
probabilities
18. ______ X chromosome ______
______
Analogies
An analogy is a relationship between
two
pairs of terms or phrases written as
a : b :: c : d. The symbol : is read as “is to,” and the symbol :: is read as “as.” In the space
provided, write the letter of the pair of terms or phrases that best completes the analogy
shown.
______19. RR : homozygous dominant ::
a. Rr : heterozygous
b. rr : heterozygous
c. Yy : homozygous recessive
d. yy : heterozygous
______20. phenotype : physical appearance ::
a. genotype : value
b. genotype : set of alleles
c. genotype : cover
d. genotype : sex linkage
______21. law of segregation : alleles for the same trait ::
a. codominance : one trait expressed
b. self-fertilization : cross-pollination
c. allele pairs : law of segregation
d. law of independent assortment : alleles for different traits
______22. sex-linked traits : on X chromosomes ::
a. autosomes : on X chromosomes
b. autosomes : on X-linked traits
c. autosomal traits : on X chromosomes
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science: Biology
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Genetics
Name ______________________________ Class __________________ Date __________________
d.inherited disorders : in carriers
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science: Biology
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Genetics