Partial aneuploidy can also occur as a result of unbalanced translocations during meiosis. In humans, there are 46 or 23 pairs of chromosomes, out of which 22 pairs are autosomes, and a pair is the sex chromosomes or allosomes. Cytogenetics : chromosomes.
Autosomes still contain sexual determination genes even though they are not sex chromosomes. For example, the SRY gene on the Y chromosome encodes the transcription factor TDF and is vital for male sex determination during development.
Because it is possible to possess one copy of a deleterious allele without presenting a disease phenotype, two phenotypically normal parents can have a child with the disease if both parents are carriers also known as heterozygotes for the condition.
Female offspring are produced by the mutation on SOX9 gene in humans. From Wikipedia, the free encyclopedia.
Abnormalities in the chromosomes autosomes or sex chromosomes results in the retardation in growth of an organism or delay in development. Having three copies of an autosome known as a trisomy is far more compatible with life, however. An autosome is any chromosome that is not a sex chromosome an allosome.
The Y chromosomes contain only a few genes, while X chromosome has more than genes. Archived from the original on 21 August
In humans, there is a total of 46 chromosomes or in pair of In humans, there are 22 sets of autosomes; they are labelled or referred numerically from 1 to 22, like chromosome 1, chromosomes 2, chromosomes 3, etc. Human mitochondrial DNA.