LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

GENETICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is a gene map?
A
DNA coding that dictates where chromosomes are arranged within the nucleus.
B
It was a layout designed by Gregor Mendel that shows where pea plants grew in his garden.
C
An organized layout of the relative locations of each gene on a chromosome.
D
A set of directions folded in multiple ways that chromosomes use to navigate through a cell rather than stopping and asking for directions.
Explanation: 

Detailed explanation-1: -A genetic map is based on the concept of genetic linkage: the closer two markers are to each other on a chromosome, the greater the probability that they will be inherited together. By studying inheritance patterns, the relative order and location of genetic markers along a chromosome can be established.

Detailed explanation-2: -Genetic mapping is a way to identify exactly which chromosome has which gene and exactly pinpointing where that gene lies on that particular chromosome. Mapping also acts as a method in determining which gene is most likely to recombine based on the distance between two genes.

Detailed explanation-3: -With chromosome maps called idiograms, researchers can pinpoint the locations of genes and locate abnormal gene forms.

Detailed explanation-4: -A linkage map (also known as a genetic map) is a table for a species or experimental population that shows the position of its known genes or genetic markers relative to each other in terms of recombination frequency, rather than a specific physical distance along each chromosome.

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