Scientists discover that women's second X chromosome awakens later in life, expressing genes that protect the brain from ...

In the absence of DDM1 and RNAi, this TE doesn’t produce small RNAs, so the centromere is not methylated. These mutants also had few epigenetic tags on their histones, which contribute to the ...

Chromosome preparations were also dramatically ... and they can provide a resolution greater than 5 Mb. In addition, more sophisticated (and sometimes targeted) molecular cytogenetic analyses ...

Thus, in her experiments, McClintock observed several fundamental properties of chromosome biology ... a simple hexanucleotide with the sequence 5'-CCCCAA-3' on one strand and 5'-TTGGGG on ...

The X chromosome carries at least 150 genes linked to intelligence. Since the mother has two X chromosomes to pass along while the father only has one, the mother’s contribution to the child’s ...

"You either have XX or XY chromosomes," Rep. Nancy Mace, R-S.C., wrote Feb. 20 on X. "Those are the options." Most commonly, a person is born with two X chromosomes (female) or an X and a Y (male).

The nucleus of each human body cell contains 46 chromosomes. Each chromosome contains about 1000 genes. There is enough DNA in all the cells in a human body to stretch to the sun and back again ...

The central part of each nucleosome (core particle) is a cylindrical structure (5.7 nanometers in height ... compaction of ...

Though the genetic code of a human being is contained within 46 chromosomes, only half of this number exists within the cell of a sperm or egg. If the cells didn't have half, a fertilized egg ...