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Fine mapping of quantitative trait Loci on bovine chromosome 6 affecting calving difficulty

H G Olsen1, T H E Meuwissen, H Nilsen

  • 1Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, N-1432 As, Norway. hanne-gro.olsen@umb.no

Journal of Dairy Science
|October 24, 2008
PubMed

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Related Concept Videos

X-linked Traits01:19

X-linked Traits

In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.
X-linked Traits01:19

X-linked Traits

In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.