Multiple Choice
In a genetic mapping experiment, the mean map distance between two genes is closest to which of the following values?
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4. Genetic Mapping and Linkage
Mapping Overview
Multiple Choice
In genetics, a gene map shows which of the following?
A
The three-dimensional folding pattern of chromatin in the nucleus
B
The exact nucleotide sequence of a chromosome at single-base resolution
C
The complete set of proteins expressed by an organism under specific conditions
D
The relative order of genes on a chromosome and the genetic distances between them based on recombination frequency
Verified step by step guidance1
Understand that a gene map, also known as a genetic map, represents the arrangement of genes on a chromosome in terms of their relative positions and distances.
Recognize that gene maps are constructed using recombination frequencies, which measure how often two genes are separated during crossing over in meiosis.
Recall that recombination frequency is proportional to the physical distance between genes: the higher the recombination frequency, the farther apart the genes are on the chromosome.
Note that gene maps do not provide the exact nucleotide sequence or the three-dimensional structure of chromatin, nor do they show protein expression profiles.
Conclude that gene maps specifically show the relative order of genes and the genetic distances between them based on recombination frequency.
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