A genetic map is used to locate and identify the gene or group of genes that determines a particular inherited trait.
Locating and identifying genes in a genetic map is called genetic mapping.
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Jeremy Corbyn has accused Theresa May of producing a "bargain-basement Brexit" plan and "demeaning" the UK's European standing.
The family said that there will "always be a welcome in Wales" for the former intelligence analyst and whistleblower.
British tennis player Dan Evans has caused a shock by beating No.7 seed Marin Cilic in four sets at the Australian Open.