Multiple Choice
Which of the following statements about microRNAs (miRNAs) is true?
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3. Extensions to Mendelian Inheritance
Overview of interacting Genes
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A linkage group is best described as all of the alleles:
A
that produce the same phenotype
B
that are inherited from the same parent
C
that assort independently during meiosis
D
located on the same chromosome
Verified step by step guidance1
Understand the concept of a linkage group: it refers to a set of genes or alleles that are physically located on the same chromosome and tend to be inherited together because they are linked.
Recall that genes located on the same chromosome do not assort independently during meiosis, unlike genes on different chromosomes which follow Mendel's law of independent assortment.
Recognize that alleles producing the same phenotype or inherited from the same parent are not defining features of a linkage group; rather, physical proximity on the chromosome is key.
Linkage groups help explain why certain traits are inherited together more frequently than expected by independent assortment, due to their chromosomal location.
Therefore, the best description of a linkage group is all alleles located on the same chromosome, which tend to be inherited as a unit.
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