1q21.1 microdeletion is “a chromosomal change in which a small piece of chromosome 1 is deleted in each cell,” according to MedlinePlus. “The deletion occurs on the long (q) arm of the ...

the macronucleus and the micronucleus (Figure 1). The micronucleus is the germ-line nucleus that contains five normal pairs of chromosomes, but it is transcriptionally inactive under most ...

The research focused on parts of chromosomes known as human accelerated regions (HARs ... HARs make up a big portion of the 1% difference, which can lead to dramatically different outcomes ...

Save guides, add subjects and pick up where you left off with your BBC account. An example of a human chromosome mutation is when a child inherits an extra copy of chromosome 21. Each cell has ...

Each cell with a nucleus contains chromosomes, which are made from DNA Human body cells each contain 23 pairs of chromosomes, half of which are from each parent. So, human gametes (eggs and sperm ...