Genetics Worksheet With Answer Key - Douglas J. Burks, Wilmington College Of Ohio
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7BIO322: Genetics
Douglas J. Burks
Department of Biology
Wilmington College of Ohio
Problem Set 1
Due @ 10:35 AM January 14, 2011
Chapter 2: Problems 1, 4, 9, 11, 15, 16, 23, 25, 29, and 31.
Problem #1. For each of the terms in the left column, choose the best matching phrase in the
right column
a. Phenotype.
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1. Having two identical alleles of a given gene
b. Alleles
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2. The allele expressed in the phenotype
c. Independent assortment
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3. Alternative forms of a gene
d. Gametes
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4. Observable traits
e. Gene
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5. A cross between individuals both heterozygous for two
genes
f. Segregation
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6. Alleles of one gene separate into gametes randomly with
respect to alleles of other genes
g. Heterozygote
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7. Reproductive cells containing only one copy of each gene
h. Dominant
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8. The allele that does not contribute to the phenotype of the
heterozygote
i. F
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9. The cross of an individual of ambiguous genotype with a
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homozygous recessive individual
j. Testcross
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10. an individual with two different alleles of a gene
k. genotype
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11. the heritable entity that determines a characteristic
l. recessive
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12. the alleles an individual has
m. dihybrid cross
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13. the separation of the two alleles of a gene into different
gametes
n. homozygote
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14. offspring of the p generation
Problem #4. An albino corn snake is crossed with a normal colored snake. The offspring are all
normal-colored. When these first generation progeny snakes are crossed among themselves, they
produce 32 normal colored-snakes and 10 albino snakes.
a. Which of these phenotypes is controlled by the dominant allele?
The 3:1 ratio and the loss of the albino trait in the F
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indicates that normal-colored is the dominant gene allele.
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S p r i n g 2 0 1 1
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