Page 204 - Science Course 3 (Book 1)

Mo5-L2: Vocabulary Review

Direction: Each of the sentences below is false. Make the sentence true by replacing the underlined
word(s) with a term from the list below. NOTE: You may need to change a term to its plural
form.

codominance genetic engineering incomplete dominance monohybrid cross
multiple alleles mutation pedigree polygenic inheritance Punnett square

sex-linked trait

1. A(n) Punnett square can be used to trace the inheritance of a particular trait
within a family.

2. A cross between one organism with the genotype Rr and another organism
with the genotype Rr is an example of genetic engineering.

3. Human blood type is an example of polygenic inheritance because it
includes three alleles: IA, IB, and i.

4. Eye color in fruit flies is a(n) pedigree because the alleles for eye color are
carried on the X chromosome.

5. The probability of the genotypes and phenotypes of the offspring of a
particular cross can be predicted with a(n)mutation.

6. Incomplete dominance can be passed from parents to offspring only if oc
curring in the reproductive cells.

7. Traits, such as human height, that have a wide range of outcomes, are
controlled by multiple alleles, which is the interaction of many different
genes.

8. Through codominance, scientists are able to insert the human insulin gene
into the DNA of bacteria. The bacteria can then produce human insulin.

9. A cross between round radishes and oblong radishes produces oval
radishes. This is an example of a(n) sex-linked trait, in which the offspring’s
phenotype is a combination of its parents’ phenotypes.

10. In the case of a(n) monohybrid cross, both parental alleles can be
independently observed in the offspring’s phenotype.

Mo5-L2: Key Concept Organizer

Direction: Answer each question or respond to each statement in the space provided.

Question Answer
1. Are all traits dominant or
recessive? Explain.
2. Give an example of
incomplete dominance.

3. How many alleles for a trait
can a person inherit? Explain.

4. If the phenotype of human
blood is Type A, what are the
possible genotypes?
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