Multiple Choice
In a typical karyotype analysis, chromosomes are visualized as tightly packed DNA. Which technique is commonly used to prepare and observe chromosomes in this way?
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3. Extensions to Mendelian Inheritance
Overview of interacting Genes
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The alleles of linked genes tend to:
A
mutate at a higher rate than unlinked genes
B
assort independently due to their location on different chromosomes
C
always undergo crossing over in every meiotic division
D
be inherited together because they are located close to each other on the same chromosome
Verified step by step guidance1
Understand the concept of linked genes: Linked genes are genes located close to each other on the same chromosome, which means they tend to be inherited together during meiosis.
Recall Mendel's law of independent assortment, which states that genes on different chromosomes assort independently, but linked genes do not follow this law strictly because of their physical proximity.
Recognize that linked genes do not always undergo crossing over; crossing over can separate linked genes, but it does not happen in every meiotic division.
Note that mutation rates are generally independent of whether genes are linked or unlinked; linkage affects inheritance patterns, not mutation frequency.
Conclude that the correct statement is that linked genes tend to be inherited together because they are located close to each other on the same chromosome.
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