An extra chromosome during staining can lead to genetic diseases, which are difficult to treat and pose significant health risks to children, especially in terms of mental health. For instance, males with an extra Y chromosome may exhibit hypervirility and are more prone to antisocial behavior.

1. What Happens When There is an Extra Chromosome?

Infants and young children with genetic diseases often have an additional chromosome due to chromosomal abnormalities, which is a congenital genetic disease. This may be caused by congenital deformities or genetic diseases that lead to developmental disorders and malformations. It is recommended to consult a formal hospital for examination and treatment.

2. What Disease Is Caused by an Extra Chromosome?

Partial trisomy of chromosomes can be divided into two major categories: one involves trisomy of a certain chromosome segment (duplication) accompanied by abnormalities of other chromosomes (such as deletion or translocation), resulting in complex phenotypes with symptoms of both duplication and deletion segments; the other involves simple duplication or trisomy of a specific segment of a chromosome, which is extremely rare in humans.

3. What Happens When a Human Has an Extra Chromosome?

A very small number of males have an extra sex chromosome, with their XY turning into XYY or XXY. If it becomes XYY, i.e., with an extra Y chromosome, the male may exhibit hypervirility and be particularly masculine. Some studies have found that the proportion of male inmates with XYY sex chromosomes is significantly higher than in the general population, making them more aggressive and prone to antisocial behavior.