BSCS Biology: A Molecular Approach

Chapter 13: Patterns of Inheritance

Other Patterns of Inheritance

1.
When both phenotypes of a trait, rather than just one of the traits, appear in heterozygous individuals, the alleles are said to be ____.
A)codominant
B)incomplete
C)shared
D)recessive
2.
Genes located on the same chromosome are said to be ___, and are often inherited together.
A)codominant
B)shared
C)linked
D)genotypes
3.
What is the "Barr body" shown in this female cell nucleus?
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A)a hollow spot
B)a tightly condensed, inactive X chromosome
C)a source of nutrients for the chromosomes
D)a typical nondisjunction
4.
Trisomy, or three copies, of human chromosome 21 produces ___, the most common serious birth defect in the United States.
A)Klinefelter syndrome
B)nondisjunction
C)Turner syndrome
D)Down syndrome
5.
Most human traits are ____, affected by several genes and environmental factors.
A)codominant
B)shared
C)linked
D)multifactorial
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